Priapulida – penis worms

Priapulida (priapulid worms or penis worms) is a phylum of marine worms. They are named for their extensible spiny proboscis, which, in some species, may have a shape like that of a human penis.

penis worm

dirty penis worm

Penis worms live in the mud, which they eat, in comparatively shallow waters up to 90 metres. They feed on slow-moving invertebrates, such as polychaete worms.

Only sixteen extant species of priapulid worms are known.

penis worm

Priapulids are cylindrical worm-like animals, ranging from 0.5 to 20 centimetres in length, with a median anterior mouth quite devoid of any armature or tentacles. The body is divided into a main trunk or abdomen and a somewhat swollen proboscis region ornamented with longitudinal ridges.

penis worm

The priapulids are gonochoristic, having two separate sexes (i.e. male and female).

penis worm

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