In English, the plural of "fish" is fish when referring to individuals and fishes when referring to species. Most fish are cold-blooded, their body temperature varying with the surrounding water, though some …

Oct 28, 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 …

Learn all about Fishes - what is a fish, their evolution, anatomy, characteristics, life cycle, adaptations, and much more - with pictures.

Fish live in various marine ecosystems, from the polar oceans to the tropical coral reefs. Whether you are a marine biologist, aquarist, an owner of fish farms, or a curious reader, this exploration of the …

All fish share two traits: they live in water and they have a backbone—they are vertebrates. Apart from these similarities, however, many of the species in this group differ markedly from one...

The fishes is the most diverse group of vertebrates on the planet; (the other vertebrates are the mammals, amphibians, reptiles, and birds). With over 35,000 living species of fishes, often it can be …

Fishes are animals that live and swim in the water (although you might see a fish like a mudskipper or walking catfish crawling on land), are cold-blooded (except for tunas and marlins and mako sharks …