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The robust sea cucumber has a soft body and lacks a spine, but it does have an endoskeleton consisting of microscopic spicules, or ossicles, made of calcium carbonate. [2] C. robustus has a respiratory tree that allows it to extract oxygen for respiration, using the anus to pump water.
Sea cucumbers can be found in great numbers on the deep seafloor, where they often make up the majority of the animal biomass. [17] At depths deeper than 8,900 m (5.5 mi), sea cucumbers comprise 90% of the total mass of the macrofauna. [18] Sea cucumbers form large herds that move across the bathygraphic features of the ocean, hunting food.
Sclerodactyla briareus is an elongated oval or cigar-shaped sea cucumber and grows to about 15 centimetres (5.9 in). It often adopts a characteristic pose with both ends raised above the substrate. At the anterior end there is a mouth surrounded by a ring of ten, short, branched feeding tentacles. [2]
The Japanese sea cucumber has a cylindrical leathery body with blunt, thorny protuberances. At the anterior or front end there is a mouth surrounded by a ring of short feeding tentacles and at the posterior end is the anus. There are three different colour morphs, red, green and black. [3]
E. godeffroyi is a long, slender sea cucumber growing to a length of about 40 cm (16 in). A ring of fifteen feathery tentacles encircle the mouth. The body colour is creamy white with blotches of grey and a pair of longitudinal brown or greenish stripes.
Eupentacta quinquesemita is a species of sea cucumber, a marine invertebrate with an elongated body, a leathery skin and tentacles surrounding the mouth.It is commonly known as the stiff-footed sea cucumber or white sea cucumber, [2] and occurs on rocky coasts in the northeastern Pacific Ocean.
Isostichopus badionotus, also known as the chocolate chip cucumber or the cookie dough sea cucumber, is a species of sea cucumber in the family Stichopodidae. This common species is found in warm parts of the Atlantic Ocean .
The body of Holothuria glaberrima is cigar-shaped, with a whorl of twenty bushy feeding tentacles at the anterior end surrounding the mouth. The cuticle is leathery and tough; the dorsal surface is smooth, while the ventral surface or "sole" bears three longitudinal rows of dark brown tube feet. This sea cucumber grows to a length of 10 to 15 ...