Selection

• According to Sea World, hermit crabs inspect a potential shell for any damage and slip inside to try it on. If it isn't a good fit, the hermit crab returns to its old shell and keeps looking.
  
  

Fun Fact

• Hermit crabs will steal the shells of another hermit crab if the original occupant leaves the shell, even for a few minutes.
  
  

Symbiosis

• Sea anemones often attach themselves to hermit crabs' shells, but the hermit crab is a willing participant, according to Nature.com. The hermit crab likely provides transportation for the anemone, while the anemone offers the hermit crab some protection from predators with its painful sting.
  
  

Types

• In addition to shells, hermit crabs use other objects for shelter, including coral, stones and even old soda cans.
  
  

Misconceptions

• According to Hermit-crabs.com, many people think hermit crabs bite, but they have no teeth, just fuzzy mouthparts.