Freshwater fish
Freshwater fish are the most common freshwater creatures. It is a fish that resides in fresh water. Earth's freshwater area is small, freshwater fish species are very rich, accounting for 41.2% of the total fish. About 28,000 species of fish around the world, about 10,700 species of freshwater fish. Although the total number of less than seawater fish, but the freshwater waters only 2.5% of the total water, so freshwater fish is much more abundant than seawater fish. The average amount of water per habitat of each marine fish is 7500 times higher than that of freshwater fish. As the inland rivers are often separated, freshwater fish are easy to specialize, so there are many species in the case of habitat water less than seawater fish. ...