Encounter Atlas

Creature index / Lake and sea monsters

Steller's sea ape

Also called Sea ape, Simia marina, Siren cynocephala, Trichechus hydropithecus

A playful, whiskered, dog-headed sea animal a naturalist watched off Alaska in 1741 and never identified.

On 10 August 1741, naturalist Georg Steller, sailing with Vitus Bering's expedition, watched a strange animal swimming near the ship off the Shumagin Islands in Alaska for about two hours. He described it as about five feet long, with a dog-like head, pointed ears, large eyes and drooping whiskers, a thick grey and reddish fur coat, no visible front limbs and a tail with two fins like a shark's.

It rose upright in the water, dived under the ship again and again, and played with a long piece of seaweed. Steller fired at it to get a specimen but missed, and it swam away. In 1965 sailor Miles Smeeton and two companions reported a similar animal off Atka Island.

Several naturalists later gave it scientific names, but most experts think Steller saw a young northern fur seal behaving unusually.

What witnesses report

  • A dog-like head with long whiskers
  • Rising upright in the water
  • Playful, curious behaviour around a boat
  • Thick grey and reddish fur

Famous cases

  1. 1741Georg Steller watches the 'sea ape' for two hours
    Shumagin Islands, Alaska
  2. 1965Miles Smeeton reports a similar animal
    Atka Island, Alaska

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