Stock Photo - The Prideaux hermit crab Pagurus prideaux and cloak anemone Adamsia carciniopados are usually found in association It has been documented that the crab can exist without the anemone but not vice versa However a solitary cloak anemone has been seen lying on the sea bed with tentacles extended up into the water With its tentacles positioned on the underside the anemone benefits by gathering the leftovers from the crabs feeding activity The crab benefits from a defensive mechanism which grows continually eliminating the need to replace shells If threatened the anemone will emit a tangle of threads containing stinging cells as shown here To 50 mm NE Atlantic, Cape Verde Islands to Norway, Mediterranean