Sasung (Sipunculus Nudus)
As in all peanut worms, the body of S. nudus consists of a sac-like portion called the trunk and an eversible proboscis called the introvert. The mouth is located at the anterior end of the introvert and is surrounded by a group of tentacles. The body of the adult worm is around 15 centimetres in length but can reach up to 25 cm in some cases, of which about 3.5 centimetres to 6 centimetres correspond to the introvert.
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