Heteromastus sp. (Eisig, 1887)

Size Up to 180 mm long and maximal 1 mm wide, for more than 150 segments. Color Anterior body red; posterior body yellowish or reddish-green. Habitat Lives in branching burrows, supported by mucus. Produces wormcasts on the surface of the bottom. From upper eulittoral down to lower abyssal (4680 m). Favours muddy sand and tolerates pollution and changing salinity grades. Mobility Discretely motile. Feeding Deposit feeder. Burrowing head-down feeders. Life cycle Free spawning with planktotrophic larvae. Distribution Arctic, North Pacific, North Atlantic.