coryphaena hippurus is diurnal and gluttonous, often chasing surface fish such as flying fish and sardines, and sometimes jumping out of the water to prey. It is the companion fish of tuna and swordfish. The hippurus can grow to a maximum of about two meters, and they often like to cruise in groups in the clear and vast surface of the sea, which also makes it easy for hippurus with their bright body color to reveal themselves. During a long period of natural selection, hippurus evolved the ability to use the environment to hide and avoid the body, and rely on high-speed swimming to survive.

The migratory hippurus likes to go out in groups in clear weather to chase prey. They also have a habit of hiding under floating objects, such as large patches of sargassum, floating banana leaves, or under boats. But because of this, hippurus, which are active near ships, are often captured by sailors using simple hooks, primitive harpoons or fishing nets.
Fishermen are used to calling hippurus the "shade fish," and it's also nicknamed the "underwater fox." The general pelagic fish in the ocean like to show their faces. They frolicked in clusters for a while, and jumped and splashed at the same time. However, the pelagic fish, hippurus, is different. They are always silently snorkeling in the water, or quietly hiding under the floating objects on the sea surface. The swimming speed is very fast, generally reaching 30-50 kilometers per hour. Therefore, once hippurus shows up, other aquariums have to retreat.
The coryphaena hippurus likes to hide under the floating objects. At first, the fishermen thought it was taboo from the sun and liked to perch in the shade, so it got the name "shade fish". Later, it was finally discovered that when this species of tropical and subtropical fish migrated to the coast of China, it mostly appeared in the midsummer, and the hotter the sun was, the more scorching the weather was. It is not appropriate to call it a "shade fish" when it is withdrawn from the bottom of the sea and dives deep into the seabed. However, its nickname of the "underwater fox" does not disgrace it.
The vast Yellow Sea is blue and clear, which makes the activities of the "fox" extremely inconvenient. As long as it swims a little, it will be exposed immediately. In the long competition for survival, it is getting harder and harder for the "underwater fox" to rely on the hunting method of swimming desperately. As a result, hippurus learned to use the terrain and features to hide and avoid the body, choose a place with backlight to hide, and then wait for the fish to pass by, and then attack unexpectedly. As a result, he can have a full meal without much effort. However, sometimes there are no fish passing near the float for several days, and even then, they rarely stay elsewhere, but often stay put.
hippurus likes to prey on small fish such as flying fish, mackerel or sardines. Hunting these small fish is not an easy task, they can rely on the coordinated swimming of large schools of fish to defend against predators. coryphaena hippurus had to evolve into the type of fish that swims extremely fast in the ocean.