Crabs outgrow and then shed their skins
Yes, its very healthy for them.
EXUVIAE - the cast-off skins of various organisms, such as the shells of crabs or larvae of insects
They do shed their skin (shell) several times each year as they grow larger.
Crabs have gills. The underwater ones have larger gills than the terrestrial ones. Terrestrial crabs use the humidity in the air to breathe. this is why crabs live near water even if they are land dwellers. some crabs have very small and basic lungs but these cannot function without water and are usually attached to some sort of gill.
Tough skins to minimize water loss
Habitat loss, indiscriminate hunting led to the loss of many tigers. Also, many are poached for the quack Chinese medicine trade and for their skins.
yes
Loss of tanning rate, water, quick sand, death and crabs (not that type)
Cicadas shed their skin because they are insects. All insects shed their skin. It is called molting. An insect goes through several molts before it becomes an adult with wings. Cicadas simply climb trees and then shed their skins. They are easier to find. Not only do insects spread their skins but so do spiders and crabs. Some snakes shed their skins and some birds shed their feathers.
Yes, they do. In fact, when they do, it looks like pieces of a whole new crawdad. I know this because there is a crawdad I caught from a stream across my street, and I am watching it shed its skin.
Oh, dude, crabs don't blink because they don't have eyelids. They have compound eyes that are constantly moistened by their tear glands, so they don't need to blink like us humans. I mean, imagine a crab trying to wink at you with those beady little eyes, that would be a sight to see!
Some types of crabs I know of are fiddler crabs, hermit crabs and horseshoe crabs.