pachygrapsus marmoratus common known as marbled rock crab is hiding on rock.

pachygrapsus marmoratus common known as marbled rock crab hiding amalgamate shell carapace mimicry fuse merge dark marbling yellow interflow animal sea claw crustacean wildlife seafood water closeup stone brown coast ocean creature aquatic shore nature shellfish fauna tropical eye camouflage no people hide zoology mediterranean crawfish wild reflection grey underwater marine seashore sun