A group of fish characterised by a cartilaginous skeleton, well-known species include the great white shark and the great hammerhead shark.
shark, sharks, great white shark, great hammerhead, cartilaginous fishes, dorsal fin, gill, heterocercal caudal fin, animal, vertebrates, fishes, aquatic lifestyle, predator, biology
Freshwater fish used as food in many parts of the world.
Many freshwater fishes are also popular as food.
Extinct species of fish which had thick ´armour´ protecting the head.
This bizarre-looking fish uses its bioluminescent lure to catch its prey. The animation explains how it works.
Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.
Living fossil, important stage in the evolution of tetrapods.