Mudskipper.

This kind of fish usually lives on tropical coasts and along the southern coast of my country. At low tide, they can be seen jumping on the wet sand, sometimes climbing onto the roots of mangrove trees. Even though the mudskipper has no legs, it can crawl and jump. This is mainly because its pectoral fins are very thick, like the forelimbs of land animals, and can move freely. Its pelvic fins merge into a suction cup. When it climbs onto the wet sandy ground, it can use the suction cup to attach to other objects. The mudskipper's walking action on land is very interesting: it first supports its body with its pelvic fins, and then moves forward alternately with its pectoral fins. At first glance, everyone thinks that the mudskipper moves very slowly. If it encounters an enemy, its crawling speed is quite amazing. It will also use its tough pectoral fins, sharp teeth and wide mouth to dig out a large soil hole, into which it can hide to escape the heat in the hot summer. The gill cavity of the mudskipper is large, which can store a large amount of air. At the same time, the skin of this fish is covered with blood vessels, which virtually assists breathing. When it moves on land, it often extends its tail fin into puddles overgrown with weeds, or clings to wet mud. This can also help with breathing. Mudskippers like to eat small crustaceans and insects. Their meat is delicious and tender and has high nutritional value.