In the vast ocean, a small shrimp cleans the teeth of a moray eel, and a predatory moray eel gives the shrimp protection from other dangerous inhabitants of the ocean. I thought that I was watching a wrestling match and the small shrimp defeated the huge moray eel, squeezing its jaws with its paws. But later I rethought what I saw and decided that the situation was completely different. The shrimp did not try to fight the moray eel, the moray eel helped the shrimp rise to the top. To be on top, you do not have to be powerful, it is enough to be useful to a powerful friend and help him.