Crab | Facts & Information
# Crab | Facts & Information
Crab | Discover Fascinating Facts and Information About Crab
Crab is the name given to many species of higher crustaceans in the order decapods. There are currently 6,793 species in 93 families.
CrabThe crab is a fascinating animal that belongs to the orders Decapoda and Brachyura. These creatures are well-known for their distinctive appearance, with segmented exoskeletons and powerful claws. They primarily inhabit coastal areas around the world and are particularly common in the Atlantic and Pacific oceans.
One remarkable aspect of crabs is their mode of movement. They move laterally using their side legs, called pereiopods, which are adapted for this type of locomotion. As a result, crabs can scuttle in a distinctive manner and easily traverse muddy or sandy terrain along the shore.
There are over 4,500 different species of crabs, ranging from freshwater crabs to those that live in the depths of the sea. A well-known example is the hermit crab, which, as its name suggests, lives in abandoned shells of snails or mollusks to protect its soft body. These crabs can be found worldwide but are more common in tropical zones.
The body structure of crabs is perfectly adapted to their marine environment. The hard exoskeleton provides protection against predators while also ensuring a sturdy structure that allows them to move easily and capture their food. The claw, in particular, is an essential tool for crabs, helping them catch prey and defend themselves against potential threats.
Although a significant portion of a crab's diet consists of small fish, marine organisms, and detritus, they are generally omnivorous and feed on various types of meat and marine plants. Crabs are also known for their ability to feed on carcasses and organic remains, thereby contributing to the cleaning of coastal areas and maintaining ecological balance.
Another fascinating aspect of crab life is their reproductive cycle. Most crab species reproduce sexually and carry the eggs behind them, attached to their abdomen, until they develop and hatch into small larvae called zoea. These larvae live in water until they transform into adult forms and find their own territory in saltwater.
Throughout evolution, crabs have developed a wide range of adaptation strategies for different environments and living conditions. Some species have adapted to very deep and dark marine environments, while others can survive in estuaries and freshwater ponds. Their adaptation system also includes defense mechanisms, such as changing the color of their exoskeleton to blend with their environment and camouflage from predators.
In conclusion, crabs are some of the most interesting and adaptable creatures in the animal kingdom. With over 4,500 known species and a wide range of behaviors and survival strategies, they have been able to adapt to diverse marine environments worldwide. Studying and understanding these fascinating crustaceans is essential for the conservation of marine ecosystems and to enjoy the diversity of marine life.
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.
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.
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.
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.
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.
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Crab | Facts & InformationCrab | Discover Fascinating Facts and Information About Crab