The two palps are widely separated and the eversible pharynx bears a large tooth near the rim but behind the pharyngeal opening.

[3] It is present from the lower shore down to the sublittoral zone, on soft sediments of varying types and among seaweeds.

The stolon is either female (pale orange) or male (whitish) and becomes a storage receptacle for the eggs or sperm.

Meanwhile, the parent worm remains on the seabed and starts to grow a new stolon which is ready for release some 28 days later.

Three weeks later they start to grow the pharyngeal apparatus they need as an adult and when this is complete they are juvenile worms.