Dec 21, 2025 · fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys …

fish, Any of more than 30,000 species of predominantly cold-blooded vertebrates found worldwide in fresh and salt water.

Almost all natural bodies of water bear fish life, with the exception of very hot thermal ponds and extremely salt-alkaline lakes, such as the Dead Sea in Asia and the Great Salt Lake in North America.

Dec 21, 2025 · Fish - Classification, Jawless, Cartilaginous & Bony Fishes: Fishes are typically divided into three groups: superclass Agnatha (jawless fishes), class Chondrichthyes (cartilaginous fishes), …

Jan 9, 2026 · A deviant fish may be black, spotted, golden, white, or white with silver; it may have a trilobed tail fin or protruding eyes; or it may lack the normally long dorsal fin.

fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes …

Dec 26, 2025 · Historically, the term cod referred to Atlantic cod (Gadus morhua), a cold-water fish found on both sides of the North Atlantic. In the present day, the term applies to all members of the …

Jan 2, 2026 · A smaller species, the sterlet (A. ruthenus), inhabits the Black and Caspian seas and is a valuable food fish about 0.9 metre (3 feet) long. The stellate, or star, sturgeon, A. stellatus, occurs in …

Jan 5, 2026 · The most commercially important ocean fish are species of salmon, herring, codfish, flatfish (flounder, sole, halibut, turbot), redfish (ocean perch), jack mackerel, tuna, mackerel, and …

3 days ago · Normally, sharks feed on fish, often attacking in schools. Open-ocean species such as the mackerel (Lamna), mako (Isurus), and thresher (Alopias) sharks frequently feed near the surface and …