The pelts of the sea otter was sold for high prices in other countries. A couple of hunters killed 5,000 yearly, because of this, sea otters nearly became extinct. The United States, Japan, Great Britian, and Russia signed a treaty to limit hunting. Its prey are clams and sea urchins. Sea otters have no blubber to keep warm, so their fur traps air to keep them warm.
Oil spills are especially dangerous to sea otters.
The oil prevents them from getting warm. Then they freeze. That is my report on sea otters. There are lots of kinds of rays. One of the types of rays are called skates.