Researchers announce extinction of the Chinese paddlefish

The new decade 2020 began with the sad announcement that another species is now extinct—the Chinese Paddlefish (Psephurus gladius), a close relative of the sturgeon family. A paper by Chinese scientists concluded (based ...

Asian carp roundup in Kentucky opens new front in battle

Like a slow-motion, underwater cattle drive, wildlife officials in a half-dozen aluminum boats used pulses of electricity and sound on a recent gray morning to herd schools of Asian carp toward 1,000-foot-long (305 meters) ...

Why the goby can conquer the waters of the world

The round goby, one of the most common invasive freshwater fish in the world, boasts a particularly robust immune system, which could be one of the reasons for its excellent adaptability. This is the result of genome research ...

Global warming and extinction risk

How can fossils predict the consequences of climate change? A German research team from FAU, the Museum of Natural History Berlin and the Alfred Wegener Institute compared data from fossil and marine organisms living today ...

New world map of fish genetic diversity

An international research team from ETH Zurich and French universities has studied genetic diversity among fish around the world for the first time. Their research produced a map that will serve as a tool in improving the ...

Chinese date extract improves the immune system of fish

A RUDN University biologist reports that the extract of the fruit of the Chinese date boosts immunity in carp. The addition of date juice to the diet increases the reaction of the immune system of fish to extraneous compounds. ...

East African fish in need of recovery

A study of East African coral reefs has uncovered an unfolding calamity for the region: plummeting fish populations due to overfishing, which in turn could produce widespread food insecurity.

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Fish

Tetrapods

A fish is any aquatic vertebrate animal that is typically ectothermic (or cold-blooded), covered with scales, and equipped with two sets of paired fins and several unpaired fins. Fish are abundant in the sea and in fresh water, with species being known from mountain streams (e.g., char and gudgeon) as well as in the deepest depths of the ocean (e.g., gulpers and anglerfish).

Food prepared from fish is also called fish, and it is an important food source for humans. They are harvested either from wild fisheries (see fishing) or farmed in much the same way as cattle or chickens (see aquaculture). They are also exploited by recreational fishers and fishkeepers, and are exhibited in public aquaria. Fish have had a role in many cultures through the ages, ranging from deities and religious symbols to the subjects of books and popular movies.

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