The Dwarf Blue Leg Hermit Crab, Clibanarius tricolor, features characteristic blue legs poking out of their shell. They are excellent scavengers and tank-cleaners that can help control algae and detritus and aerate sandy substrate. They are best housed in tanks with plenty of live rock and a sandy substrate. The Blue Leg Hermit Crab is reef safe, peaceful, and requires no care making it a risk-free and only beneficial addition to any home aquarium.