Marine Fishes

Fishes were the first vertebrates, appearing more than 500 million years ago. The first fishes probably evolved from an invertebrate chordate not much different from the lancelets or the tadpole larvae of sea squirts that still inhabit the oceans.

Fishes soon made their presence felt and have had a tremendous impact on the marine environment. They feed on nearly all types of marine organisms. Fishes are the most economically important marine organisms, and marine fishes are a vital source of protein for millions of people. Some are ground up as fertilizer or chicken feed. Leather, glue, vitamins, and other products are obtained from them. Many marine fishes are chased by sportfishing enthusiasts. Other are kept as pets and have brought the wonders of ocean life into many homes.