Crab is the name given to many species of crustaceans in the order of decapods. Currently, 6793 species are known in 93 families. Most live in water, some species prefer to live on land near water.
The greatest variety of crabs is in the tropics and southern Australia. They are also called Crabi king, Porcelain crab, Crawl crab, etc.
Crabs are omnivores.
They feed primarily on algae and molluscs, worms, other crustaceans, fungi, bacteria, other crab species, etc.
For crabs a mixed diet of plants and animal meat represents the fastest growth and development. Crabs are renowned for the effort they make for their family. This is about taking care of puppies and feeding their puppies throughout the breeding season and beyond.
Crabs sum up for 20% of all crustaceans caught and consumed worldwide annually (1.5 million tonnes). Crabs are prepared and consumed in different ways around the world.
Some are completely consumed, with shells (only those with soft shells), and others eat only claws or legs. As such, crabs are spiced strongly. One way to cook is to extract the crab meat and mix it with flour.
Crabs have a variety of shapes and sizes, but they have almost the same type of body. All crabs have a pair of pliers and four pairs of legs used for movement.
The internal organs are protected by a bone carcase. On the inside you can see their mouth and abdomen.
The gills can’t be seen, but in the mouth there can be seen a series of short leg pairs that help the crab manipulate and chew the food.
Crabs move sideways. This is due to the leg joints that force the crab to walk obliquely.
However some crabs go forward or backward. Some species can swim. Crabs are the most active animals with complex behavior.
They can communicate through beatings like drums or waving pliers. Crabs are aggressive to each other and often struggle for domination, territory, or females. In 2005 Norwegian researchers concluded that these animals did not feel the pain. Later it was discovered that these crustacean animals are able to perceive the pain.
Females typically lay eggs after copulation, but can store and retain sperm for several months.
The eggs are fertilized by passing through the place where the semen is held. The number of eggs transported by a crab can be very high. Adults can transport tens of thousands of eggs.