close-up picture of sea cucumber in its natural environment, on a rock, marine life(stichopus japonicus

animal aquaculture aquatic blue body burma chinese close-up collagen colourful consumption coral cucumber deep disease dive diving ecosystem edible egypt elongated environment fish floor food human indonesia invertebrate japonicus life lifestichopus marine natural nature nutrients ocean pacific recycle red reef rock sand sea seafood skin snorkeling systems tropical tropics turtle undersea underwater water wildlife