The scarlet reef hermit, Paguristes cadenati, is probably the most colorful of the small hermits found in the Caribbean and is highly sought after for its algae cleaning abilities. These bright red crabs are most often found along the reef, down in the cracks of coral heads by day and browsing all over the reef by night. They are generally considered reef safe and like most hermit crabs they are scavengers, so not only will they eat unwanted algae, they will eat left over bits of food that fall to the bottom.