How many fish species are there? The most often quoted estimate of the number of fish species is20,000. There may be as many as 20,000 more.
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How many types of fish are there in the world?
Worldwide, the number is over 10,000 species. Some species of freshwater fish, such as salmon and trout, are called anadromous. They hatch in fresh water, head out to sea, where they live until they return to fresh water to reproduce.
How many fish species live in freshwater?
Nearly half of all fish species live in fresh water, which means they swim in the rivers, lakes, and wetlands that make up less than 3 percent of Earth water supply. There are more than 800 known freshwater fish species in North America alone. Worldwide, the number is over 10,000 species.
Where do fish live in the ocean?
Different species of fish exist around the globe and have adapted to living in diverse aquatic environments, such as rocky shores, kelp forests, deep-sea waters, rivers, streams, and ponds. The first species to be classified as fish were soft-bodied chordates during the Cambrian Period.
How many species of life exist in the world?
Conservative estimates put the number of species at two million but can be as high as 30 million. However, biologists are yet to identify over 80% of the presumed number of species in the world.