Living in China's southern shallow water mudskipper, is a kind of fish will climb the tree. In order to hunt for terrestrial insects, small crabs and sandworms, etc., they landed in groups from the water, crawling on the mudflats, jumping, and sometimes even climbed to the mangrove branches. Therefore, people also call this fish jumping fish or mud monkey. The base of the pectoral fins of the mudskipper has developed muscles that can swing back and forth, which can be used to crawl and support the body, and its left and right ventral fins fuse together to form a suction cup, which allows the mudskipper to attach itself vertically to the mangrove branches by relying on the suction cup. The climbing perch is also a tree-climbing fish. With the spines of its hard pectoral and anal fins, along with the side-to-side swinging of its body, this fish can quickly climb tree trunks.
"Fish can't stay out of water." How is it that mudskippers and climbing perch, for example, can survive without water? The vast majority of fish only use gills to breathe can not leave the water, only a few fish have another auxiliary respiratory organs, so they can leave the water in the air to live for a period of time. It has been found that the mudskipper's oral cavity lining the distribution of many tiny blood vessels, the fish can leave the water without dying, mainly oral cavity plays a supporting respiratory role. Climbing perch gill cavity in the back, there is a kind of fungus like folded film, there are also many microvessels on it, plays a special role in assisting respiration.
These auxiliary respiratory organs and development, after a long straight road. Some scientists believe that after the emergence of fish within the class on earth, will also go through a lot of trials and tribulations. When the water quality corruption and lack of oxygen or dry water, many fish can not adapt to this change and died, but some fish due to structural mutations and survive. The auxiliary respiratory organs of mudskippers and perch, for example, are a mutation of their ancestors' adaptations to adverse environments.