yes but it will be the same size
Yes they can
No, they find new ones.
No they grow out of their shells and find a new one.
They can grow a new limb if they loose one
No hermit crabs do not grow back skin
Crabs grow out of their shells and they also shed their skin to do that. Meaning they molt their skin.
Sea cucumber
Absolutely. Everything that breathes air has lungs.
Crabs are generally sea-dwelling, while shrubs grow on land. Not much chance for crabs to eat shrubs.
Hermit Crabs live on the bottom of the ocean and eat the grasses that grow on the bottom.
As they grow, they start to form a new softer shell beneath the outter shell. Once they are too big to stay in their old shell, they shed it, and use the new shell they've grown.
No; they are two different species.