Tribe:

Annelida

Class:

Polychaeta

Habitat:

Hard soil

Occurrence:

In the north-eastern Atlantic Ocean including the North Sea and the Mediterranean Sea; Red Sea; Coral Sea

Size:

Spherical to sausage-shaped body with pale to dark green colouring
At the front is a retractable muscular proboscis with a forked head flap that can be extended to over one metre

Behaviour:

The female stays under gravel or in rock crevices to avoid daylight. Only the grazing proboscis with head fork is visible, the trunk is hidden in a cave. The 1 to 3 mm long males live in the oviducts of the up to 15 cm long green female.