The Caribbean hermit crab, Coenobita clypeatus, also known as the soldier crab, the West Atlantic crab, the tree crab, and the purple pincher (due to the distinctive purple claw), is a species of land hermit crab. Typically, the Caribbean hermit crab's left claw is larger in size than its right claw and is purple in color.
Coenobita clypeatus is a terrestrial hermit crab found in tropical and sub-tropical areas. Living in humid areas this terrestrial hermit crab is a nocturnal scavenger that uses a gastropod shell to protect its soft body parts. These creatures are extremely social, foraging and traveling in groups.
The ones available are considered small to medium size