? ? ? ? Fish and lantern fish are one kind. ? ? ? ? There are lanterns on the fish head, so it is also commonly known as lantern fish. This lantern is a luminous fishing rod evolved from the front dorsal fin. There are millions of luminescent bacteria at the top of the fishing rod, which look like small fish. The reason why lanterns shine is that there are gland cells in lanterns, which can secrete fluorescein. Under the catalysis of luciferase, fluorescein reacts with oxygen for slow chemical oxidation and emits light. They mainly prey on small fish or young fish.