And Levi has helped document how sea otters have increasingly become prey for wolves around Glacier Bay National Park. Main Characteristics Of The Sea Otters Anatomy. The sea otters have a flexible skeleton and their face is small and round. While sea otters are vulnerable to natural predators such as sharks, the population also faces risks from other factors such as disease, contaminants, availability of prey, and entanglement in commercial fishing gear. In the Monterey Bay, the sea otter lives in kelp forest and estuary habitats. North American river otters, like most predators, prey upon the most readily accessible species. Fish is a favored food among the otters, but they also consume various amphibians (such as salamanders and frogs [3] ), freshwater clams , mussels , snails , small turtles and crayfish . Their measurements vary depending on the sex. The two are directly related in that sea otters prey on sea urchins, which in turn can help foster kelp beds because urchins feast on kelp. Adult males weight between 22 and 45 kilograms and measure from 1.2 to 1.5 meters.On the other hand the adult females usually weigh between 14 and 33 kilograms, and their length varies from 1 to 1.4 meters.. The two are directly related in that sea otters prey on sea urchins, which in turn can help foster kelp beds because urchins feast on kelp. Diet analysis suggests that butter clams are their preferred prey in Southeast Alaska (La Roche 2020). The sea otter is an important part of both of these habitats — It’s a keystone species, which means that the health of sea otters is a good indication of the health of other species and ecosystems nearby. Sea otters … The Basics. Habitat. What wasn’t apparent from the surface as we cruised through the corridor of sea otter carnage in Shakan Bay was what effect the foraging activity had on the soft seafloor below, which was what I was to later investigate in eelgrass habitat. High metabolism means they control numbers of their prey species. Hunted nearly to extinction by the fur trade, sea otters are endangered and currently exist in only a portion of their historic range. The sea otter is a well-known marine mammal with a historical range along the west coast of North America. Researchers working in Alaska’s Katmai Coast have discovered a surprising new interaction between mammals on small islands off the coast: grizzly bears are preying on sea otters. The two are directly related in that sea otters prey on sea urchins, which in turn can help foster kelp beds because urchins feast on kelp. 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