"A wide-ranging and common species in the North Pacific, although there seems to be a gap between Sakhalin and the western Aleutians. Ranges from Korea to the Bering Sea and from Alaska to southern California; 25-3239 metres." (Lambert, Austin 2007)
"May be abundant on mud or partially buried in the sediment. Off central California at 1500 metres depth, researchers recorded a density of 30 individuals per 0.1 square metre." (Lambert, Austin 2007)
"Disc: Flat and circular, up to 11 mm in diameter, and covered by 200-300 scales. The central scale and one next to the radial shields are larger than the other scales; scattered spines may be present. The length of the radial shields is about a quarter the disc diameter; they are two to three times longer than their width and usually touching at their distal ends. The arm comb has 10 or 12 long, slender, pointed spinelets, and there is often a secondary arm comb beneath it.
Arms: The dorsal arm plates are much wider than their length near the disc, becoming narrower and longer as they near the tip; they curve where they contact each other. The first ventral arm plate is about three times wider than its length, and the others become just wider than their length and diamond-shaped or elliptical. Each arm has three slender, sharp spines, the uppermost the longest and equal to or exceeding the joint. The tentacle pores are large. The first pore opens into the mouth and is protected by five or six scales on each side; the more distal pores are protected by three or four spine-like scales on the lateral plate and two or three on the ventral plate, distally reducing in number to one.
Mouth: Oral shields are longer than their width and curve distally. Six or more narrow, pointed oral papillae line each side. The genital slits are conspicuous from the oral shield to the margin of the disc. Scales along the edge of the genital slit have a series of minute papillae that grade into the arm comb.
Colour: Reddish-brown or grey and beige above; a preserved specimen is white, yellowish or pale grey." (Lambert, Austin 2007)
"Salmon-orange and pink eggs, about 0.2 mm in diameter, indicating either an ophiopluteus larva or somewhat abbreviated development." (Lambert, Austin 2007)
"Feeds on benthic material, including small crustaceans called cumaceans." (Lambert, Austin 2007)
