The term for an animal that primarily eats fish is “piscivore.” Piscivores are adapted to hunting and consuming fish as their primary food source. Various animals fall into this category, including birds like herons and ospreys, marine mammals such as dolphins and seals, and certain fish species like barracuda and pike. The physical adaptations of piscivores often include specialized hunting methods, such as sharp beaks or teeth and streamlined bodies for efficient swimming. These adaptations allow them to exploit aquatic environments effectively, contributing to the balance of ecosystems in marine and freshwater habitats.