Species: Hydrolagus colliei, Spotted ghost-shark

Hydrolagus colliei Lay & Bennett, 1839

Spotted ghost-shark

Body compressed, relatively elongate (length before anus 67-93% length from gill opening to origin of upper tail fin lobe), tapering to a filamentous tail; head very large; snout short, round, conical; eyes large, bright green; nostrils large, before mouth, connected to outer corner of mouth by a deep groove covered with a flap; mouth under head; teeth are plates, 2 pairs above, 1 pair below; gill opening before pectoral, covered by fleshy operculum; 2 separate dorsal fins; 1st dorsal fin large, triangular, erect, with a long spine at front entirely bound to fin; 2nd dorsal fin low, long based, its border deeply indented in center, breaking it into two parts; anal fin absent; pectoral fins broad, triangular; pelvic fins broad, triangular; tail fin elongate, lance-like, both lobes about equal in height , with a whip-like rear filament; lateral line canals well developed, on head and body noticeably open; skin smooth, no scales; males with large, multipointed external sex organs.