These are pale, clearly segmented worms, with two pairs of small antennae.

They can dig relatively fast through sandy sediments. They can also swim with sinuous movements.

Nephtyids are active predators, with a strong muscular proboscis, armed with two well developed jaws.

http://www.marinespecies.org/polychaeta/aphia.php?p=taxdetails&id=956 accessed 17/02/14