Parastichops tremulus, like all sea cucumbers, has a cylindrical and very slightly flattened body with a tentacular mouth at one end and the anus at the other end. It can reach up to 50 cm in length and 10 cm in diameter. The tentacles are aranged in the shape of a mop are are usually around twenty in number. The underside has three rows of tube feet and is pale pink to white in colour. Large papillae are scattered on the upper side, which is bright red in colour with black spots. The skin is smooth and firm.
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