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 ...

Fish are vertebrates (vertebrates have backbones) that live in water. They breathe using special organs called gills.

A type of carp, goldfish were domesticated nearly 2,000 years ago for use as ornamental fish in ponds and tanks. They were seen as a symbol of luck and fortune, and they could only be owned by ...

Before you break out the tartar sauce, learn some facts about fish to keep yourself and the environment healthy. Chemicals in Seafood. Some fish may contain harmful chemicals, which can be the result of both natural causes and water pollution.

Get Weird But True! facts about fish. Check out Weird But True! videos, fun facts, and more.

Betta fish—also known as Siamese fighting fish—are among the oldest species of domesticated fish. Their scientific name, Betta splendens, combines two languages: Malay for “enduring fish ...

There are more than 800 known freshwater fish species in North America alone. Worldwide, the number is over 10,000 species. Some species of freshwater fish, such as salmon and trout, …

Meet the real "Nemo," the colorful clownfish. Find out how these fish can reproduce even though all their young are born male.

The jellylike creatures pulse along on ocean currents and are abundant in cold and warm ocean water, in deep water, and along coastlines. But despite their name, jellyfish aren't actually fish—they're invertebrates, or animals with no backbones.

2013年10月22日 · The oarfish is the world’s longest bony fish. The giant oarfish ( Regalecus glesne ) was first described in 1772, but it has been rarely seen because it lives at considerable depths.