Carapace longer than wide. 6 spines on gastric area; 4 in one line, and 1 on each side of the ridge near the hepatic region. 8 to 10 marginal spines. Rostrum long and compressed and minutely spined. Chelipeds with numerous spines and narrow fingers. Walking legs compressed and armed with short spines. Abdomen ridged but not spined except for minute spines on tail fan. Males with paired uniramous gonopods on 1st and 2nd abdominal segments. Female with small paired pleopods on segments 2 to 5.
SizeLength 35 mm; large specimens, up to 67 mm, often taken in fjords, are probably an undescribed species.
ColourCarapace and abdomen red-brown overall, ventrally lighter or white; ridges red with grooves white, and blue spots in cervical groove. Chelipeds with red spines; fingers red with distinct white tips. Walking legs with irregular light bands. Tail fan light coloured.