Species: Deania profundorum, Arrowhead Dogfish, Arrowhead Dogfish Shark

Deania profundorum (Smith & Radcliffe, 1912)

Arrowhead Dogfish, Arrowhead Dogfish Shark

Body slender; snout extremely long, broad, flat, like a spatula, length before mouth > 1/2 head length; no nictitating eyelids; eyes huge, green to yellow; spiracles present, large, just behind eye; lip furrows long; upper & teeth blade-like, without secondary cusplets; upper teeth with erect, triangular cusps, narrower bases; lower teeth much larger than upper teeth, overlapping, broad bases, oblique cusps; filas de dientes: 26-31 superiores, 26-30 inferiores; five gill slits, all before pectoral fin; two dorsal fins with large grooved spines, 2nd fin spine much larger ; 1st dorsal short and high, origin over inner margins of pectorals, distance from origin of spine to free rear tip slightly > free rear tip to 2nd dorsal spine; 2nd dorsal higher & shorter than 1st; pectoral free rear tips narrow, angular to round, not elongated; no anal fin; tail base with a keel along ventral edge; tail fin strongly asymmetrical, upper lobe with strong notch under tip; skin surface very rough, skin denticles relatively small, ~erect, narrow star-shaped bases, tips on a long stalk, like 3-pointed pitchforks; denticles on flank small, crown length ~0.25 mm; lower edge of tail base between pelvics and tail fin with a keel.

Uniform dark grey to dark brown; fins dusky.

Reaches 104 cm

On and over the bottom in deep water

Depth range 275-1785 m

All 3 oceans; Virginia to the SE Caribbean (Dominica)