Youngichthys is an extinct genus of prehistoric sarcopterygian or lobe-finned fish from the Upper Permian comprising a single species, Youngichthys xinghuansis.

In 20 food habit studies across the species' range, fish comprised 56% of the diet of nesting eagles, birds 28%, mammals 14% and other prey 2%.

In Southeast Alaska, fish comprise approximately 66% of the year-around diet of Bald Eagles and 78% of the prey brought to the nest by the parents.

Meat, fish and seafood comprise much of the giant menu, but there are a few pasta and vegetarian offerings as well.

Commercial fishing is conducted by trawler and the fish comprises a major part of the flatfish trawl fishery from California northward to the Bering Sea.

Small bony fishes, including lanternfishes, hakes, grenadiers, rockfishes and lightfishes, comprise the bulk of the African sawtail catshark's diet.

Somewhat uniquely, neither fish nor shrimp comprise the upper trophic species.

A one-year study of scats in India's Keoladeo National Park found that fish comprised approximately three-quarters of the diet, with the remainder consisting of birds, insects, and small rodents.

In the August period in the middle part of the island, fish comprise 28% of their diet.