Origin
Crab is the name given to many species of higher crustaceans in the order decapods. There are currently 6,793 species in 93 families.
Most live in water, a few species prefer to live on land near water.
The greatest diversity of crabs is in tropical seas and South Australia. They are also called king crabs, porcelain crabs, horseshoe crabs, etc.
Crab Feed
Crabs are omnivores.
They feed primarily on algae and mollusks, 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 known for their effort for their family. It is about caring for the hollow and feeding the chicks throughout the mating season and not only.
Crabs make up 20% of all crustaceans caught and consumed worldwide annually (1.5 million tons). Crabs are prepared and consumed in different ways around the world.
Some are eaten entirely, with the shell with everything (only those with the soft shell), and from others are eaten only pliers or legs. In asia crabs are eaten heavily spiced. One way of cooking is to extract the meat from the crab and mix it with the flour.
Crab Appearance
Crabs have a variety of shapes and sizes, but they have almost the same body type. All crabs have a pair of tongs and four pairs of legs used for placement.
Internal organs are protected by a bony carapace. On the inside you can see the mouth and abdomen.
The gills cannot be seen, instead a series of pairs of short legs can be seen at the mouth that assist the crab in handling and chewing food.
Crab Behavior
Crabs move to the side. This is due to the toe joints that basically 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 drum-like Beats or waving tongs. Crabs are aggressive towards each other and often struggle for dominance, territory or females. In 2005 Norwegian researchers concluded that these animals do not feel pain.
It was later discovered that these crustaceans are able to perceive pain.
Crab Breeding
Females usually lay eggs after copulation, but can store and retain sperm for several months.
The eggs are fertilized by passing through the place where the sperm is kept.
The number of eggs carried by a crab can be very large. Adults can hatch tens of thousands of eggs.
