Phoca is a genus of marine mammals commonly known as true seals. They are characterized by their streamlined bodies, lack of external ear flaps, and the ability to move efficiently in water. True seals are found in various oceans and seas around the world, often inhabiting cold and temperate regions. These animals primarily feed on fish and invertebrates, using their sensitive whiskers to detect prey in dark or murky waters. Phoca species, such as the harbor seal and gray seal, are known for their social behavior, often seen resting on rocks or beaches in groups.