Phyllodoce groenlandica (Örsted, 1842)
Length for a certain number of segments very variable, depending on degree of constriction in preserved animals. Largest specimen observed measured about half a metre in living state. Largest number of segments reported 700.
Alive with dark pigmentation anterior to eyes and on posterior lobes. Dorsum of brownish green metallic hue, with dark transverse bands centered in pseudosegmental areas. Dorsal cirri with dark spots. Eyes dark brownish red.
On sandy mud or mud. Intertidal to at least several hundred metres.
Reproduction and larval development take place in spring and early summer. The species has a long pelagic stage.
Circum-arctic; northern parts of the North Atlantic. English Channel, North Sea, Skagerrak, Kattegat, Öresund to the Bay of Kiel.