Crab facts Most crabs have flat bodies that allow them to squeeze into very narrow crevices. From the outside, their body is covered with a dense and strong shell, which is the crab's outer skeleton. Spiders and insects also have a similar external skeleton. It is known that decapod crustaceans, i.e. crabs, lived on Earth during the Jurassic period. Crabs are very aggressive towards each other. Males often fight for the right to possess a female. In a battle with other individuals or as a result of an attack by predators, crabs can lose a claw or a leg, which grow back over time. Crabs communicate by swinging their claws and tapping. Sea crabs are unusual creatures that have attracted people's interest since ancient times. The ancient Greeks perceived them as messengers from above, something similar to the scarab beetles of the ancient Egyptians. In the most ancient Egypt, they, thanks to the frequent change of the shell, personified rebirth. In the Inca Empire in South America, there were special beliefs - crabs live in the sky and bite off a part of the moon little by little, so that it decreases thanks to them. Crabs can feel pain. In China, they believe that a crab portends deception, in Thailand it is turned into a full-fledged participant in the summoning ceremony the rain Buddhist beliefs attributed to them signs of posthumous reincarnation of the soul. In general, in the East, crabs were favorably perceived: they protected against the adversities of the sea element and were signs of its affection. The crab's teeth are in its stomach.