This fish is huge in size yet has no fighting ability at all, clumsy and cute.

In the vast ocean live all kinds of fish, each with its own characteristics. Some have gorgeous looks that people adore, while others are so ugly that people avoid them. In the ocean there is also this kind of fish that makes people think they are silly at first glance, and this fish is the ocean sunfish.

The ocean sunfish (scientific name: Mola mola), also known as the sunfish, mambo fish or head fish, is a collective name for 3 species of ocean fish in the family Molidae, class Osteichthyes. It is distributed and inhabits tropical and subtropical oceans. It is also found in temperate or cold oceans. It is produced along the coasts of China.

The ocean sunfish is a large oceanic fish, with a maximum body length of 3.0-5.5 m and a weight of 1400-3500 kg. It swims alone or in pairs, sometimes in groups of more than ten. Small individuals are more active and often leap out of the water, while large individuals move slowly, often lying on their side at the surface, or with their dorsal fin exposed above the water, and can also dive into water more than a hundred meters deep. It feeds on seaweed, mollusks, jellyfish, planktonic crustaceans and small fish.

In fact, the ocean sunfish has many names. In the United States people call it sunfish, because it often goes to the sea surface to "sunbathe"; in the UK people call it head fish, because it seems to have only a head. Most Chinese people call it ocean sunfish, because it often floats up and rolls on its side. Each country has its own name for it.

The ocean sunfish has an oval, flat appearance and looks rather strange, as if half of it had been cut off. Despite being flat, the ocean sunfish actually has especially thick skin, up to 15 cm thick, and it is very elastic. In the 16th century, the skin of the ocean sunfish was rolled into balls by fishermen's children to play with.

The ocean sunfish has a "looks silly" appearance, as if it has no attacking power, but in fact it really is silly, and when facing an attack from an external enemy it has no strength to fight back. They like to sunbathe, and when the weather is good they expose their fins above the water and drift with the current; when the weather is bad they lie on their side at the surface. Because of this they are often washed onto the coast, and humans do not need to make any effort to catch them, because they deliver themselves right to the door.

The fish can weigh up to 3.5 tons and be 5.5 m long, with a short, small tail, two bright eyes and a small mouth. What is more interesting is that their mouths cannot close, which makes people very curious about how they catch food, and whether it will leak out after they eat it?

The ocean sunfish moves slowly, and coupled with its gentle temperament, it is often attacked by large marine carnivores such as killer whales and sharks. Because it very much likes to lie on its side at the surface, even sea lions bully them. Once a sea lion lies on the back of an ocean sunfish and bites it, they have no way to deal with it and can only stare with their eyes. Although it is very painful, they do not even show a pained expression; it is all inner drama, and one might think they have no feeling at all!

Clumsy and poor at swimming, with no ability to fight back, the silly ocean sunfish will even swim into fishermen's nets by itself. By rights, this species should have gone extinct long ago. The reason it has still not gone extinct to this day is thanks to its powerful reproductive capacity: the ocean sunfish can lay 300 million eggs at a time, relying entirely on numbers to sustain itself. It is comparable to a cockroach of the ocean, except that the difference is that cockroaches are detested by people.