* Invertebrates:
* Sea urchins: A major food source, especially for otters in kelp forests. They use rocks as tools to break open the urchin's shell.
* Clams, mussels, and other shellfish: Otters pry open these bivalves with their strong teeth and paws.
* Crabs, snails, and other crustaceans: Otters catch these creatures with their paws and eat them whole.
* Fish: Sea otters eat a variety of fish, including herring, cod, and flounder.
* Other: Occasionally, they may also eat abalone, squid, and even small birds.
Important Note: Sea otters are critical to maintaining healthy kelp forests. Their consumption of sea urchins prevents these herbivores from overgrazing kelp, which provides vital habitat for many marine species.