This motile species is known exclusively from deep waters (range 930-2222 m) and has been recorded from the deeper parts of the Norwegian Sea, the Laptev Sea and probably the Sea of Beaufort. As with many deep-sea species very little is known about its biology. Nereis gracilis is likely to be an omnivorous scavenger.
- MacLean, Moira, 2011. Report and photo, sighting at Dalsnuten, Norway. ROV Magnum 142. SERPENT project.
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