Polychaete - fam. Serpulidae
Distribution in scandinavian waters
Maximum length: 2,5 cm.
Appearance: The body colour can vary from a green or yellow tone
to red or brown. The crown of tentacles has
white, yellow, red or brown crosswise streaks and a blueish collar.
The pipe has an opague white colour and has a half-circuliar or triangular
cross-section with a longitudual ridge along the back and encroaches
upon the opening of the tube. The pipe is attached to some form of substrate
for most of its length.
Depth: 0-5000 m.
Environmnt: Keel worms are often
found in large quantities on rocks, mussel shells and other solid substrate.
Classification: Keel worms are part of the segmented worm group
under the polychaetes.