A typical Scotoplanes has a fat, oval body which may be around 4 inches (10 cm) in length, a mouth surrounded by ten feeding tentacles, five to seven pairs of walking “feet”, and three pairs of papillae on the upper surface of the body. Two of these pairs of papillae are long and whip-like, but the third pair is short and inconspicuous. Usually, the intestine is filled with mud. Photographs and digital images of these animals in situ show that they have a slight resemblance to feeding pigs, hence their common name "sea pig".
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