(from Coe, 1904) Usually pale yellow throughout but some specimens have a distinct reddish tinge. Others may be grey, greenish, or pale green. A median pale line appears on the dorsal surface in the region of the esophagus. This is a very slender thread-like species. Body is commonly thicker in the middle and tapers toward both head and tail. Head is very long and sharply pointed when extended. Proboscis pore is ventral and farther back from the tip of the snouth. The mouth is very far back.
- Hayward, P.J.; Ryland, J.S. (Ed.) (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp. http://www.marinespecies.org/aphia.php?p=sourcedetails&id=1
- North-West Atlantic Ocean species (NWARMS) http://www.marinespecies.org/aphia.php?p=sourcedetails&id=2901
- Gibson, R. (2001). Nemertini (Nemertae), in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 152-156 http://www.marinespecies.org/aphia.php?p=sourcedetails&id=1363
- Trott, T.J. 2004. Cobscook Bay inventory: a historical checklist of marine invertebrates spanning 162 years. Northeastern Naturalist (Special Issue 2): 261 - 324. http://www.marinespecies.org/aphia.php?p=sourcedetails&id=3072
- MEDIN (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN, version 1.0. http://www.marinespecies.org/asteroidea/aphia.php?p=sourcedetails&id=149081
Common on the coast of New England, shores of northern Europe, Mediterranean, Pacific coast of USA (Alaska)
Eyes are absent in adults although embryos have a single pair soon after they leave the egg.
Can extend 3-6 inches but can contract to a fraction of this length.
Depth range (m): 0 - 0
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Very common at high water mark under stones and in muddy places, among decaying mussels, etc. The worms were commonly found in black, slimy, and very foul mud.
Known Prey Organisms
They are often associated with reddish nematodes.
Life History and Behavior
Capable of great extension and contraction. Individuals may extend themselves until they resemble a very fine thread, but if disturbed, may quickly coil themselves into a closely wound spiral.