Why does a crab she'll help it survive in his habitat
Yes, with medical help.
The crab's exoskeleton helps and supports its body. It protects the soft body of the crab. It is also waterproof, so it will protect it underwater, too.
Yes they are scranvengers
The eye's location could help it survive because it gives them a good view of their surroundings. I'm not quite sure about the mouth! Sorry!
the eye helps it see very far to see prey or predaders.
No they can go under for about a minute.
meerkats heve like like the same eye color and look as their parents
yes but it maters what kind of crab you have
If I am right, adaptation is something we need to survive on. So we do not need to survive on our eye color
They can survive by plenty of heat and moisture
sheds its shell to allow for its growth and to regenerate limbs