I. Reasons

Indian fish is famous for being able to swim on sharks or other marine animals or ocean hulls. Relying on the flat oval sucker on the top of the head, the sucker seems to be transformed from the dorsal fin spines to form pairs of transverse plates with different numbers. Indian fish is slender and dark in color, and lives in warmer waters all over the world. Eating the food scraps of the "host", in some cases, like a cleaner, eating the parasites outside the "carrier".

Second, a brief introduction to Indian fish

Indian fish (remora also known as sharksucker or suckerfish), also known as? , a kind of marine fish. It is famous for being able to adsorb on sharks or other marine animals or swim on ocean hulls. Indian fish is slender and dark in color, and lives in warmer waters all over the world. Feeding on the food residue of the host, in some cases, like a cleaner, eating parasites outside the carrier.

III. Introduction to Sharks

Sharks are considered by some people to be one of the fiercest fish in the ocean. But the whale shark, the largest among sharks, feeds on small marine life, similar to baleen whales. Because food has some similarity, after a long biological evolution, they look very similar to baleen whales. This is called "convergent evolution". So the name "whale shark" is natural.

There are about 380 kinds of sharks in the world. There are 30 kinds that will attack people actively, 7 kinds may cause injuries, and 27 kinds are dangerous because of their size and habits. According to the investigation of fossils and scientists' calculations, sharks have lived on the earth for about 400 million years. They existed as early as 400 million years ago, and their shapes have not changed much so far, indicating that they have strong viability and are called "sea hunters".