A relationship between two individuals (animals, plants, humans…) can only last long if both parties benefit. If a relationship only benefits one party, that relationship will not last long. That is the law of symbiosis.

This hygienic shrimp is crazy reckless. They dare to climb into the eels’ mouths full of sharp, jagged teeth, digging around their teeth to find food. This is a long-standing feeding habit of this species of shrimp, which specializes in eating parasites in the mouths of eels and fish.

Some species of hermit crabs and sea crabs often carry sea anemones on their backs. It’s not that sea anemones are tired and want to go for a ride, actually both benefit: snails use sea anemones to ward off enemies (because sea anemones contain toxins in their tentacles), on the contrary, sea anemones Thanks to snails, you can escape the “semi-paralyzed” condition and can earn more food when traveling with snails.

Goby fish and hard-shelled shrimp live happily together. Both live in a cave dug by a shrimp, and the fish is responsible for protecting the shrimp. The eyesight of this species of shrimp is very poor, so they have to rely on their eyes, which are very sharp-eyed, to tell them when it is safe to go out. On the contrary, thanks to shrimp, goby can have a “home” to take refuge and rest.

Sharks are perhaps the least loved species in the ocean. They are big, fierce, cruel. So why are they so generous in letting the fish cling to their underbelly? Previously, this relationship was thought to be a commensal relationship – one species benefited, while the other did not benefit at all, but now everything is clear, not only scavenging sharks’ leftover food, cod fish also helps clean up parasites living under the shark’s belly; And the benefits they enjoy from sharks are obvious: no matter how much they crave pressed fish, no animal dares to hang around in the face of “death”.

Ankylosaur fish have a terrible appearance, they are also quite cunning when using their own victims to lure other victims. Their “fishing rod” is a glowing antenna swinging above their head. Actually, this species does not have the ability to glow, that light comes from millions of glowing bacteria – a dish of scale fish. feet – cling to them to avoid drifting into the terrible mouth below.

These king shrimp often ride on animals that are many times larger than them, and move faster than them. When this giant “vehicle” moves on the seabed, the “emperor” will swing down to pick up pieces of food mixed in the mud.

Clownfish are probably the only species that can resist the toxins of sea anemones. They can bounce back and forth between poisonous tentacles without being harmed. Sea anemones eat the rest of the fish’s food, and in return, they protect the fish from being eaten by other species.