They are arthropods and invertebrates; having no internal skeleton, they require an exoskeleton. They are basically underwater cockroaches (actually, they share more similarities with scorpions).
It protects and supports the animal body. The shell is also waterproof, so if the crab goes in the water, it will still protect it from underwater predators.
The exoskeleton helps the crab to protect itself from hungry predators, and it protect and supports the animal body.
it is hard
yes
yes it does
By its exoskeleton
its exoskeleton
The omnivorous "Clawed Lobster", no doubt.
They both have an exoskeleton.
No. They have a Exoskeleton or shell.
exoskeleton
exoskeleton
they have an outer coat which is very strong and they have sharp claws
The exoskeleton of a lobser is more commonly called the shell. It is made of a protein called chitin.
Its called an Exoskeleton.