 It is common round the coasts of Britain between the tide marks but is relatively little observed because it is well camouflaged and is often hidden in cracks, under overhangs, in rock pools, under seaweed, among mussels or half buried in sand and mud with just its tentacles projecting.In Morecambe Bay, England, it is found anchored to stones buried several inches beneath the surface of this expanse of mudflats, or sometimes not even attached at all but living freely.It can retract into a spherical form when disturbed and no longer be visible from the surface.