

Steller's Sea Cow
Hydrodamalis gigas
🌊🐄
Chordata
Mammalia
Sirenia
Dugongidae
Hydrodamalis gigas
The Steller’s Sea Cow — Hydrodamalis gigas was a colossal sirenian that once inhabited the cold, kelp-rich waters of the North Pacific. Discovered by Europeans in 1741, it was driven to extinction within just 27 years of its discovery due to overhunting.
Description
Steller’s Sea Cow (Hydrodamalis gigas) — This massive marine herbivore was the largest member of the order Sirenia, reaching 7–9 meters in length and weighing up to 8,000–10,000 kg. Unlike its modern relatives, the dugong and manatees, the Steller’s sea cow had a thick blubber layer, smooth bark-like skin, and no functional teeth (instead using keratinous plates for grinding kelp). It was slow-moving and spent its life grazing in shallow coastal waters, particularly around the Commander Islands near Kamchatka. Its social herds made it even more vulnerable to human exploitation.
Quick Facts
Max Mass
Shoulder Height
Standing Height
Length
Diet
Trophic Level
10000
0.5
2.5
7.9
kg
m
m
m
Mixed Feeder
Herbivores – Grazers
Hunt History
Indigenous peoples of the North Pacific may have occasionally hunted Hydrodamalis, but it was the arrival of Vitus Bering’s expedition in 1741 that sealed its fate. Georg Wilhelm Steller, the ship’s naturalist, described the animal in detail. Following this, Russian fur traders and sailors hunted the sea cow relentlessly for its meat, hide, and fat. The meat was said to taste like veal, and the blubber burned cleanly as lamp oil. Within less than three decades, the species was exterminated.
Earliest Archaeological / Historical Evidence of Human Predation:
Commander Islands, Russia (1741) — First recorded observation and harvest by Bering’s expedition crew.
Steller’s accounts (1741–1742) — Detailed notes describing how crews butchered sea cows for survival.
Russian hunting settlements (1740s–1760s) — Systematic slaughter leading to extinction by 1768.
Time & Range
Extinction Status
Globally Extinct
Extinction Date
Temporal Range
Region
300
BP
Holocene
North America
Wiki Link
Fat Analysis
Fatness Profile:
High
Fat %
25
Est. Renderable Fat
2500
kg
Targeted Organs
Blubber/subcutaneous fat
Adipose Depots
Blubber/subcutaneous, abdominal visceral
Preferred Cuts
Blubber strips
Hunt Difficulty (x/5)
4
Historical Entries
September 4, 1741
Arctic Passage - First Scientist of the Bering Sea
Russians aboard the St. Peter visit the Aleutian inlands and meet the native people there for the first time. A scientist named Steller records their characteristics and describes the encounter - in which brandy and tobacco were offered to the Aleuts while a piece of whale blubber was offered to the Russians.
On September 4, while the St. Peter was attempting to continue its
western course against a persistent wind, the Russians encountered their
first Americans. Two natives in kayaks paddled toward the ship, shouting
as they came. No one on board the St. Peter could understand what the
natives were saying, but the Americans gestured toward the land, pointed
to their mouths and scooped up sea water with their hands to indicate an
offering of refreshment to the Russians. The Russians tied two Chinese
tobacco pipes and some glass beads to a piece of board and launched it
toward the closest kayak. In turn, one of the Aleuts tied a dead falcon to a
stick and passed it to a Koriak aboard the St. Peter. Apparently the Aleut
wanted the Russians to place other gifts between the bird's claws and
return the falcon on the stick, but instead, the Koriak tried to pull the
Aleut closer and, in alarm, the Americans released the stick.
A boat was lowered from the St. Peter for a shore party. Steller,
Waxell, the Koriak interpreter, and several seamen rowed to the beach. A
landing on the rocky shore was impossible; so three of the boat party
undressed and waded ashore to be greeted by friendly Aleuts-
natives of the Aleutian Islands- who presented a piece of whale blubber.
One Aleut was bold enough to paddle out to the St. Peter and was given a cup of brandy. which he downed, then hurriedly spat out. Brandy not being well received, the Russians offered their second most prized delicacy, a lighted pipe. This, too, was rejected.
On the beach the Aleuts were quite taken with the Koriak
interpreter, presumably boccause his features resembled their own. As the
Russians prepared to return to the St. Peter some of the Americans held on
to the Koriak, and others tried to haul the boat ashore. This
confrontation between Americans and Russians was a classic case of
mutual distrust and misunderstanding and was resolved by the classic
method a show of superior force. Three of the boat crew fired their
muskets over the heads of the Aleuts, who swiftly released Koriak and
boat and threw themselves on the ground. The Russians dashed to the
water. The first test of strength was concluded. All the elements of the
future subjection of the Americans by their eastern neighbors had passed
in review. Tobacco and liquor had made their initial appearance. The first
echoes of the firearms soon to enslave a free people resounded from the
hills. Both peoples were disappointed and frustrated by the events: the
Russians because "we had not been able to observe what we had intended
but on the other hand had met what we had not expected"; the Aleuts
because, apparently, their intentions had been misunderstood. 25 The
Russians laughed at the Aleuts' consternation as they picked themselves
up "and waved their hands to us to be off quickly as they did not want us
any longer." 26 These laughs of derision and the futile waving of the
Aleuts were significant characterizations of the respective assertions of
the two peoples. History was to demonstrate that the Aleuts were no
match for the aggressive Russians. Yet waving the Russians away would
not banish them. This first contact was a prelude and a brief but
prophetic introduction to the subsequent bloody incidents that were to
occur in the conquest of the Bering Sea.
Steller, accustomed to moralizing on his own endeavors and those of
his companions, did not indulge in any reflections on the future of the
Aleuts, though he made a close observation of their physical appearance,
"They are of medium stature, strong and stocky, yet fairly well
proportioned, and with very fleshy arms and legs. The hair of the head is
glossy black and hangs straight down all around the head. The face is
brownish, a litle flat and concave. The nose is also flattened, though not
particularly broad or large. The eyes are as black as coals, the lips
prominent and turned up. In addition they have short necks, broad
shoulders, and their body is plump though not big-bellied." 27
The Aleuts wore what Steller guessed to be "whale-gut shirts with
sleeves, very neatly sewed together, which reach to the calf of the leg.
Some had skin boots and trousers and carried iron knives. Steller
speculated on the probability that the Americans knew the craft of
metalworking. He also described the Aleut kayak, noting its resemblance
to those of Greenland Eskimos.
"The American boats are about two
fathoms long, two feet high, and two feet wide on the deck, pointed
towards the nose but truncate and smooth in the rear." 29 The boats had a
frame construction covered with skins and a manhole which could be
made watertight. To this circular hole was attached a strip of material
which could be "tightened or loosened like a purse. When the American
has sat down in his boat and stretched his legs under the deck, he draws
this hem together around his body and fastens it with a bowknot in order
to prevent any water from getting in." 30
Steller did not believe that the Aleuts made their homes on the
islands. He had not yet observed any of their dwellings and assumed that
they only visited the wind-swept islands on hunting forays from the
mainland. He also speculated on the origins of the Americans, noting
their physical similarities to Siberian peoples, which suggested an Asiatic
relationship.
July 5, 1742
Arctic Passage
"The sea cow's meat tasted like the finest beef, and its fat was equally succulent. Until harried out of existence, the beast was to provide the most favored sustenance of the Bering Sea fur traders. The largest sea cows were 35 feet long and 20 feet in girth, The sea cow which Steller dissected weighed 8,000 pounds"
DEATH AND LIFE ON BERING ISLAND The expedition members who had strength enough set about providing some shelter against the wind and snow flurries that swept the beach. Winter was fast approaching, and there was an immediate need to improvise some protection for Bering and the other seriouslv ill men who were carried ashore. The men instinctively constructed shelters which resembled the Aleut dwellings traditionally built in the same latitudes- pits hollowed out of the sand, roofed with canvas sails and other material from the St. Peter. Succor did not come soon enough for some of the seamen. Several expired soon after they were conveyed ashore- the death toll was mounting. Blue foxes, at first observed joyfully by the mariners as a potential food supply, soon proved to be a great nuisance. The animals, unawed by the presence of men, darted about the camp, thick as flies, stealing any tood left unguarded and terrorizing men too weak to drive them off. In one day, Steller and Plenisner killed sixty of the audacious beasts, felling some with axes and stabbing others with knives, using their carcasses as a temporary shelter wall. Each day the slaughter continued, until heaps of carcasses were strewn about the camp site, and still the foxes came, blind to their destruction in their mad quest for food. The bodies of the dead seamen were horribly mutilated before the surviving seamen could summon up enough energy to bury them in the sand. Even then, the The sows foxes desecrated the shallow graves, digging the bodies from the carth and farrying away bloody limbs. Foxes also marauded the rowinkat and stores which the Russians were gradually bringing ashore from the St. Peter. They scattered the provisions, carried off clothing, tools, and anything else that was not secured. Steller recalled the greed of the Russians for the furs of Kamchatka foxes during the preparated of the voyage and wondered whether they were being chastised for it by the Scourge of the Bering Island animals. Half crazed by the persistentche she thieving beasts, the Russians tortured and maimed as many rokee of They killed, gouging out eyes, slicing off ears and tails, half skinning some and half roasting others in their camp fires. Neither torture nor wholesale hutchering helped. The foxes infested the camp in increasing numbers and with unchecked audacity.
On November 14, a week after the initial landing, Steller and other hunters clubbed to death four sea otters; the first ones killed on Bering island. From their Kamchatka experiences the Russians were familiar with the sea otter and knew the value of its pelt in the Chinese trade. But the precious skins meant nothing to them now; they stewed up the best parts of the otter flesh to make a dish more palatable than that from the despised foxes and left the pelts to be devoured by the camp robbers. In the wake of the Bering expedition, better-fed Russians were to visit Bering Island and the Aleutians for the primary purpose of hunting sea otters. The discovery of the sea otters in November 1741 initiated the conquest of the Bering Sea, the exploitation of its resources and people. For the succeeding century, the quest of the sea otter was to underlie every event that took place. On December 8, Commander Bering's long suffering came to an end. For days he had lain half buried in the sand that had drifted into his wretched hut, protesting any efforts to clear it away. "The deeper in the ground I lie," he told Waxell, "the warmer I am; the part of my body that lies above ground suffers from the cold." 1 Bering's body was dug from the sand, tied to a plank, and thrust down into the ground, after which the burial service was read over his remains. Throughout December other deaths followed that of Berings; a total of thirty men expired in November and December. "Our plight was so wretched," wrote Waxell, "that the dead had to lie for a considerable time among the living, for there was none able to drag the corpses away; nor were those who still lived capable of moving away from the dead."? For days a dead man shared the hut in which Waxell and Khitrovlay: Whil the only able-bodied men left took time from hunting and other larks to undertake burial. Weak as he was, Waxell offered some direction. Neither then nor later, when he had recovered his health, did he attempt to drive the men. That was not an acceptable way of exerting one's power and authority. ' "Severity would have been quite pointless. Discussions on courses of action were participated in by all; the distinction between officers and seamen was erased by the circumstances waxell was cheered when the sick seamen felt well enough to sit up for card games; their play helped them pass the time and overcome the melancholy that was as deadly as scurvy. All did not share his lenient view. There were, though, certain members of our company who criticized my attitude on this point and told me to my face that I was nor discharging my duties in accordance with the regulations." + These illiberal complaints did not originate with severe, regulation-minded Russian officers, but with the expedition's most notable civilian, Georg Steller. "The sickness," wrote Steller, "had scarcely subsided, when a new and worse epidemic appeared, I mean the wretched gambling with cards." In lurid terms he described the men's obsession with gambling, their constant conversation over gains and losses, a general debauchery that resulted in theft, hatred, quarrels, strife, and the wasteful killing of sea otters for their pelts. On this last result, Steller did have a point, if it was true that otters became scarce because their furs were used as gaming stakes. Yet it does seem that the naturalist overstated his case--whether out of concern for a dwindling food supply, his abhorrence of a mindless animal slaughter, or because of a revulsion at a recreation with which he had no sympathy. While lacking the sunny bliss of the palm-studded islands of the South Pacific Ocean, Bering Island was not an entirely unfortunate place to wash up upon. Though unpromising in its rock-girded appearance, the island was not by any means infertile and desolate. Sea and land birds nested there in prodigious numbers. Foxes abounded all over the island, and its shores were the refuge of teeming herds of seals, sea lions, sed cows, and sea otters. With the Pribilof Islands of St. Paul and St. George far to the east on the Bering Sea, the Commander Islands constituted the world's major breeding rookeries of the fur seal. Hunters had no difficulty finding plump ptarmigans, foxes, seals, and sea otters, and Steller busied himself gathering antiscorbutic herbs. By this time Lieutenant Waxell, one of the iron men of the expedition, Was ultering from scurvy and was nursed by seller. Steller was one of a handful of men who remained in good health, a blessing for the less fortunate. He had strength enough to turn his energies to the care of the sick, forgetting, for a time at least, the actual and imagined insults suffered on the voyage. For the first time, the young naturalist's word had weight; no one interfered with his supervision of the scurvy victims. For once Seller would have the leisure to make a close investigation of a newly discovered land, and the island seemed to offer more natural curiosities than had been noted on the two previous landings of the vovage.
While on Bering Island, Steller did his most important work- dissecting and describing the sea cow- -a scientific task which would assure his fame for all time. Seller also devoted much attention to the bird life of Bering Island, much of which was familiar. One bird, however, followed the sea cow's road to extinction and was long known only through Steller's description. This was a large cormorant, unable to fly, hence a prime target for food hunters. This bird, which weighed 12 to 14 pounds, was seen by only one naturalist, Steller, and disappeared about 1850. Other birds he was the first to discover were Steller's Jay, Steller's Eider, the rare Steller's Eagle, and Steller's White Raven. Steller's botanical work was of equal distinction to his observations of marine life, birds, and land animals. He classified scores of unknown plants for the first time.
Through the winter the castaways subsisted on birds and various mammals, and in May the hunters brought in the first of the sea cows that fulfilled all the needs of the expedition. The first was a 4-ton monster with enough meat to feed the men for two weeks. Its rich, red flesh tasted like excellent beef, and its snow white, almond-flavored fat was "of such exceptionally good flavor and nourishment that we drank it by the cupful without experiencing the slightest nausea."& Steller's enthusiasm for the sea cow's potential was unbounded. "These animals are found at all seasons of the year everywhere around the island in the greatest numbers, So that the whole population of the eastern coast of Kamchatka would always be able to keep itself more than abundantly supplied from them With fat and meat." Truly, Steller's sea cow, as it came to be called, was a marvelous beast; yet the naturalist's prediction for its future was based in a false estimate of its numbers. It is probable that the sole grounds of the mammal were the coasts of the Commander Islands. In the spring it was decided to build a small ship from the remains of the St. Peter. Dismantling the stoutly built St. Peter occupied all of April, and on May 6, the keel of the new ship was laid. All three of the St. Peter's carpenters had died earlier. However, by good luck, one survivor of the voyage, a Siberian Cossack, had some shipbuilding experience and supervised the construction. Twenty men constituted the building party. The others were responsible for providing food for all. In July, the ship was completed, and provisions- -mostly sea cow meat and water were laid aboard. On August 10, the launching of the new St. Peer took place, and three days later the survivors were ready for the sea. Severe restrictions had to be imposed on individual baggage because of the limitation of space. Space had to be reserved for the valuable sea otter pelts which, as Waxell pointed out, were the spoils that repaid the men somewhat for their sufferings. Proceeds from the otters were divided, apparently according to rank. Steller received 80 skins of the 900 which were carried back, but he was outraged by his weight allotment of 360 pounds. He had to abandon what we recognize today as the single most precious trophy of the expedition-_the stuffed skin of a young sea cow, as well as a sea cow skeleton and specimens of the sea otter, fur seal, and sea lion. Plant seeds, a pair of the sea cow's horny palatal plates, field notes, and personal items accounted for the 360 pounds he was allowed. Waxell's weight allowance was twice that of Seller's, but others' allowances must have been much less, since the total weight allowed the forty-six men was only 3½ tons. Steller stormed and raged, but to no avail. Crowded aboard, the men took a last look at their abandoned camp. New occupiers had already taken over. "We watched the foxes on shore ransacking our dwellings with the greatest glee and activity and sharing among themselves what was left of fat and meat." 8 Their passage to Petropavlovsk, the port they had left fifteen months earlier, took just two weeks. At long last the first American expedition had ended. Steller survived the voyage but died in Siberia shortly after reaching the mainland. Considering the limited landfalls of the expedition, Seller had gathered a comprehensive picture of the natural life of the Bering Sea. And despite his own reservations regarding his work, Steller deserves his high rating among the world's pioneer scientists.
Georg Wilhelm Seller's hard-won fame rests on the accurate descriptions of the sea cow and other marine mammals which were published in his De Besis Marims. His dissection of a female sea cow in July 1742 can easily be considered one of the high points of Pacific Ocean scientific activity. This great northern manatee is known only through Steller's notes and the few skeletons collected years later. For 100 years, the sea cow has been extinct. A living specimen was last seen in 1768, a mere 27 years after its discovery by the Bering expedition. Steller observed these mammals along the entire shore of the island. where they fed on seaweed near the mouths of streams. The sea cow's appetite was huge. When not mating or caring for their young, they were continuously occupied in feeding along the sea edge, usually with half their body above the surface. June was the mating season and a strict ritual ensued. "The female flees slowly before the male with continual turns about, but the male pursues her without cessation. When, however, the female is finally weary of this mock coyness she turns on her back and the male completes the mating in the human manner." In mating, the males penetrated their mates with a six-foot-long penis of corresponding thickness. Sea cows were unafraid of people and allowed their approach without showing any sign of alarm. Prior to the landing of the Bering party, they had never known an enemy, but, unfortunately for their survival, their bulk and shore-feeding habits were to make them a helpless prey. The Russians found the flesh of seals strong and coarse and liked that of the sea otter even less, but the sea cow's meat tasted like the finest beef, and its fat was equally succulent. Until harried out of existence, the beast was to provide the most favored sustenance of the Bering Sea fur traders. The huge mammal had instincts that seemed almost human. Although unwary in its own defense, the manatee tried to protect its kind from the butchering hunters. When the Bering men harpooned a sea cow and towed it to the beach, other animals formed a circle about the victim as if to prevent its sacrifice. "Some attempted to upset the yawl; others laid themselves over the rope or tried to pull the harpoon out of [his] body, in which they succeeded several times." In astonishment, the Russians observed "that a male came two days in succession to its female Which was lying dead on the beach, as if it would inform himself about her condition. For all this sensitivity, the sea cows were otherwise obtuse. Regardless of the slaughtering that went on among the herd, they never shifted location to escape the bloody executions.
As a scientist, Steller's chief resources were his own intellizence and energy: While men like Johann Georg Mcclit and Louis Delisle held chorere traveled with servants, provisioned with European foods and wines, Steller traveled light eating native foods for convenience and wifetife interest. Typically, Steller tackled the problem of the dissection and description of the sea cow with dedication and energy. Handling the huge manatee was extremely difficult. In shape, the sea cow resembled a seal, though it had a large fluke like a whale. The largest sea cows were 35 feet long and 20 feet in girth, The sea cow which Steller dissected weighed 8,000 pounds. The heart alone weighed 36¼ pounds and the stomach was 6 feet long, 5 feet wide, and so stuffed with food and seaweed that four strong men using a rope could scarcely move the animal from its place and only with great effort were able to drag it out of the sea. Rain and cold impeded Steller's efforts, while Arctic foxes were tearing at the mammal's flesh and carrying off Steller's paper, books, and inkstand. This unpleasant work could not be performed without considerable manpower: Steller recruited seamen and paid them in tobacco. Fortunately Sneller was a nonsmoker. Not unexpectedly, the seamen's work did not meet Seller's standards; yet, at the time, he expressed satisfaction that they did not desert him altogether in this gigantic task. Steller complained often of a lack of assistance, but he seemed to have received a great deal of help from Plenisner, who made the six sea cow drawings that enhanced De Bests Marins, and from other members of the surgical staff, as well as the Cossack, Lepekhin.
Steller's description of the sea otters on Bering Island was the first comprehensive report on the mammals to be published. The stranded Russian mariners appreciated the value of the pelts enough to tan them carefully, but they also depended upon them for a food supply. Steller noted that the sea otter had been confused bv Russians in Kamchatka with the beaver, because its fur more closely resembled the beaver than that of the familiar, smaller, river otter. Indisputably, argued Steller, the sea otter was an American sea animal which only occasionally tound its way to the coast of Kamchatka. A full-grown prime skin is 5 feet long, and 24-30 inches wide, covered with a fine fur, the hairs of which are 3/4 inch in length. Its jet black, glossy surface revealed a silver tinge when ruffled, and the presence of scattered white hairs enhanced its beauty. Unlike other marine mammals, the sea otter does not depend upon a thick blubber layer under the skin to maintain its bodr emperature in the frigid waters of its habitat. Instead it relies upon the islation of air trapped in its hair; consequently the mammal"s constantly preening and grooming its hair. Seller was unaware of this and other findings of modern biologists that have made the uniqueness of the sea otter even more clear. Of all its singularities, none is more amazing than its use of a tool to aid feeding. As it floats on its back, the after breaks clams, crabs, and other crustaceans held in its front paws against a stone resting on its chest. Otter spend most of their existence on their backs feeding, preening, and sleeping. Females carry and suckle their offspring and copulate in this position. Despite its apparently leisurely habits the otter's appetite is ravenous. Each day it requires a quantity of crustaceans and fish equaling ¼ of its total body weight of up to 80 pounds. The Aleuts of the Aleutian Islands were skilled hunters of the sea otter long before the Russians enslaved them to that purpose. They Aleuts hunted at sea from their swift kayaks, using a spearlike weapon which was thrown from the cramped sitting position of the boatman. Hunting from such a platform was a difficult exercise even in the calmest seas. A keen eve and strong, steady throwing arm were essential to accuracy. Sea otters did not present a large target above the surface, and it required a consummate skill to strike them in the water. Once hit, the otter could offer little resistance. It could dive beneath the surface for a time, but if the spear had deeply penetrated its body, this evasion only exhausted and weakened the animal. Before long the otter had to return to the surface to breathe and die as its life's blood poured from the wound. As life ebbed away, the Aleut hunter guided his craft close and lifted his prey from the water. "The sea otter is the mildest of all marine animals. It never makes any resistance to hunters, and only saves itself by running away if it can." 12 Thus Stepan Krasheninnikov in his report on Kamchatka reported of the most important resource of the Bering Sea. Natives of Kamchatka hunted the sea otter off the island's shores by spreading nets among the kelp beds where otters fed, by harpooning the mammals at sea from their small boats, and sometimes by catching them on ice floes that grounded near the coast. Kamchadals did not prize the sea otter pelt as highly as that of foxes and sables, but the Cossacks who traded for them knew better.
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From wikipedia:
When Europeans discovered them, there may have been only 2,000 individuals left.[19] This small population was quickly wiped out by fur traders, seal hunters, and others who followed Vitus Bering's route past its habitat to Alaska.[46] It was also hunted to collect its valuable subcutaneous fat. The animal was hunted and used by Ivan Krassilnikov in 1754 and Ivan Korovin 1762, but Dimitri Bragin, in 1772, and others later, did not see it. Brandt thus concluded that by 1768, twenty-seven years after it had been discovered by Europeans, the species was extinct.[1][39][47] In 1887, Stejneger estimated that there had been fewer than 1,500 individuals remaining at the time of Steller's discovery, and argued there was already an immediate danger of the sea cow's extinction.[1]
The first attempt to hunt the animal by Steller and the other crew members was unsuccessful due to its strength and thick hide. They had attempted to impale it and haul it to shore using a large hook and heavy cable, but the crew could not pierce its skin. In a second attempt a month later, a harpooner speared an animal, and men on shore hauled it in while others repeatedly stabbed it with bayonets. It was dragged into shallow waters, and the crew waited until the tide receded and it was beached to butcher it.[33] After this, they were hunted with relative ease, the challenge being in hauling the animal back to shore. This bounty inspired maritime fur traders to detour to the Commander Islands and restock their food supplies during North Pacific expeditions.[12]







