Ochetostoma erythrogrammon

Like other echiurians, O. erythrogrammon is very mobile and flexible. It consists of a sausage-shaped trunk up to in length, with reddish longitudinal grooves and a violet-coloured posterior. This is attached to a gutter-like proboscis, a third to three quarters the length of the body, green on its dorsal surface and yellowish on its ventral surface. ==Distribution and habitat==

Ochetostoma erythrogrammon occurs in the Atlantic Ocean, the Mediterranean Sea, and the Indian and Pacific Oceans. Its typical habitat is beaches of muddy sand where it lives in a burrow it digs in the intertidal zone. Countries from which this spoon worm has been reported in the Indo-Pacific region include Somalia, Mauritius, Malaysia, Indonesia, Vietnam, Hong Kong and Japan. It is also known from the Red Sea, the Mediterranean Sea, South Africa, Bermuda, Bahamas, Venezuela and Brazil. ==Ecology==

This spoon worm tunnels into the soft sediment and creates a burrow in which it lives. Digging is performed mostly by the basal region of the proboscis, with the trunk playing little part in the process. The burrow is U-shaped, having a horizontal section wide and some long, with a vertical or oblique section about long at either end. The proboscis can be extended through an entrance just wide while the other end of the tube is plugged with mud or sand. ==References==