In cowfish longhorn , Lactoria cornuta, is a variety of boxfish from Ostraciidae family , and is recognized by the century long protruding from the front of the head, and not like that of a cow or bull . Residents of the area are Indian and Pacific Oceans , and can grow up to 20 inches long . While commensurate with the home aquarium , fish and beef are becoming increasingly popular as pets .Adults are reef fish , often solitary and territorial , live in all parts of sand or rubble bottom up to a depth of 50 m . They are omnivorous , feeding on benthic algae , and various microorganisms , and foraminiferans that it strains from sediments , sponges , worms ringed apartments sand , mollusks and small crustaceans , and small fish , and are able to consume benthic invertebrates by blowing jets of water into the substrate of sand .
