The crab is an inexhaustible creature found throughout the blue sea. It is a creature that can be found in the sea, everywhere, always, in a coral reef, a low part of a coral reef, a sandy area, a mud flat area, a valley of several thousand feet.
Be it the icy Antarctica or the sweltering tropical oceans, there is no ocean of the world where crabs haven't roamed, or where crabs haven't trodden. A creature with a shell like a turtle is a crab. Crab is also a member of the class Decopod. Stone shrimps also belong to this Decopod category. There are a total of 5,000 species of crabs. From the small crab the size of a pea, to the giant crab Thirteen feet across, there are many in the sea.
Crabs typically have two large toes and 4 pairs of legs that help them walk, with a total of ten legs. The claws of crabs, also known as pincers or chelipeds, are useful to crabs in many ways. By tapping these claws, one crab communicates with another crab. These claws are used to break the shells of oysters. Sometimes the claws serve as a scissor and sometimes as a Japanese chopstick, a stick used to pick up food. This bite, which is also a weapon of the crab, grows back if it is broken.
Crab shell is made of calcium carbonate. This shell protects the crab's spongy body. Crab shells do not grow after a certain period of time. Thus, it is imperative to remove the shell as the crab grows. This shedding of shell is called molting.
Male crabs molt 6 to 7 times in the first year of life. After growing, it is enough to molt twice a year. Crabs live in hiding until the old shell is shed and a new shell grows.
A crab is not a creature that you can choose to eat by looking at a menu card in a restaurant easily. You should know what that eats for food. Crabs eat dead fish, algae, sea worms, and other crustaceans. Crabs can move in any direction. But if there is danger and it needs to run quickly, the crab will run only sideways. Crabs also include swimming crabs. The flat body of the crab helps it to crawl into rock crevices and hide.
A crab's eye consists of hundreds of powdered magnifiers. With these eyes, the crab can see in any direction. Under the sea, and also, A crab can see clearly even when it is half buried in the sand.
It was once believed that crabs do not feel pain. But later it came to be known that crabs have the ability to feel pain as well as remember it.
If the male crab chooses the female crab, (or if the female crab chooses the male crab), the male crab will hang around holding the female crab's legs for over 4 days. The male crab waits for the female crab to remove the shell, then turns female crab upside down, and makes love with it.
The tight sandy soil helps the king crab to remove its shell. King crab is the largest of the swimming crustaceans, including the blue-legged crab or Chesapeake or Atlantic blue crab and the three-spot swimming crab. In crab legs, the fin-like part at the end of the last pair of legs is used by crabs for swimming. In the world, the crab is eaten by humans as much as fish. 15 lakh tones of crabs are consumed annually.
Some types of crabs have amazing energy. A small, thin-shelled crab that can break like a biscuit in the hand, it can bite through a heavy fishing net in a matter of minutes. Even the sharp teeth of the seal fish cannot cut the fishing net.
