appearance beak beaks blood-flow captive captivity Chinese-white-dolphin clever coastal-animals color coloration colored colorful colors colour coloured colourful colours confined conservation contrast contrasting dark-spots entertaining entertainment environment environmental Indo-Pacific-humpbacked-dolphin mammal marine-park medium-sized near-threatened oceanic perfoming performance pink pink-dolphins restricted skin Sousa-chinensis spots spotted teeth wild wildlife balate brine bêche-de-mer display displayed echinoderms edible elongated fish market food for sale harvested holothurian home cooking human consumption leathery marine animals market medicinal medicine ready for purchase rubbery scavengers sea cucumbers sea food selection shapes shopping Sizes slimy slippery smell surface textured textures tough trepang variations varieties water wet wet market worm-like