Abalone eaters are animals that feed on abalone, a type of mollusk found in the ocean. Otters and sea otters are two species of animals that are known to eat abalone. Otters are semi-aquatic mammals that live in rivers, lakes, and coastal areas, while sea otters are found in the northern Pacific Ocean and are the heaviest members of the weasel family. Both species use their sharp teeth to crack open the shells of abalone and feed on the soft flesh inside.