The Phylum Sipuncula

Peanut worms

350 species
The exclusively marine peanut worms have a well-developed body cavity, but are apparently unsegmented. The forepart of the body can be tucked into the plumper part immeadiately behind. The animals of this phylum are generally sedentary, living in burrows in sand. Reproduction is sexual and the sexes are seperate.

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