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 through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes.
Fish - Reproduction, Spawning, Fertilization
Fish - Gills, Lungs, Swim Bladder
Fascinating Creatures of Japan's Mangrove Swamps
Study reveals biodiversity engine for fishes: shifting water depth, fishes
Fish - Excretion, Gills, Kidneys
Fish - Skin, Scales, Adaptations
Study reveals biodiversity engine for fishes: shifting water depth, fishes
Snailfish, Deep-sea, Abyssal, Benthic
Why Do Coelacanths' Fins Look Like Legs?
Five Aquarium Fish Best Left in the Ocean, fishes