The Steller's sea cow (Hydrodamalis gigas) is one of the largest members of the manatee and dugong family and the only one of its kind native to the cold ocean waters of the North Pacific Ocean. Steller's sea cows were once extinct since 1768, but have since been brought back from extinction by SciiFii before reintroducing them back to the Bering Strait, are common in captivity, even in Cenozoic Park. Steller's sea cows grow to 26 feet in length, and weigh up to ten thousand pounds. Sometimes their fins and undersides are covered with several barnacles, and their backs can be resting places for seagulls. The conservation status of the Steller's sea cow is Endangered due to historic poaching, however, thanks to strong conservation efforts, they are making a comeback as they are increasing in numbers.