Body slender, laterally flattened ; coxal plate 4 distal margin convex; epimeral plate 3 prolonged posteriorly, distal angle subacute. Head with broadly truncated lateral lobes; eyes moderately large, rounded. Antenna 1 elongate and slender, about two-thirds of the body length, peduncle article 1 much longer than article 2, article 3 small, flagellum very slender and about twice the length of the peduncle. Antenna 2 shorter than antenna 1, peduncle elongate and robust especially in male, peduncle article 2 elongate, articles 4 and 5 about equal, flagellum short about equal to the length of peduncle article 5. Gnathopod 1 slender, setose, merus broadly produced, carpus elongate, propodus slender and only half the length of the carpus, palm short and almost transverse, dactylus very small. Male gnathopod 2 extremely large, merus produced on the inner surface as a thin lamella overlapping the dorsal margin of the carpus, propodus very robust, elongate, palm complex, transverse, distal margin crenulate, separated from the proximal process by a deep narrow sinus; proximal process much less pronounced in small specimens. Female gnathopod 2 generally similar to male one, except that it is less robustly developed. Pereiopods 5 to 7 robust, merus broad, dactylus large with the anterior margin minutely serrate; pereiopods 6 and 7 basis broadly rounded. Uropod 3 peduncle with a single apical spine, distal article of the ramus much shorter than the proximal article. Telson short, subtriangular, dorsal surface with two pairs of stout spines.
Up to about 9 mm.
Whitish with yellow tinge, each segment with transverse orange band.
Depth range from 50 to 600 metres.
Arctic Ocean; North Atlantic, Greenland, Iceland, Norway; North Sea. Widely recorded and locally quite frequent.