Freshwater fish used as food in many parts of the world.
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Many freshwater fishes are also popular as food.
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.
Extinct species of fish which had thick ´armor´ protecting the head.
A group of fish characterized by a cartilaginous skeleton, well-known species include the great white shark and the hammerhead shark.
The life cycle of vertebrates starts with the production of the reproductive cells of an individual and ends with the production of the reproductive cells...
Living fossil, important stage in the evolution of tetrapods.
Bottlenose dolphins are sea mammals which use ultrasound for orientation.