Shark with a long snout, large eyes and 4-spiked pitchforked shaped dermal denticles

The Longsnout dogfish (Deania quadrispinosa) is a little-known deepwater shark belonging to the family Centrophoridae. They range in grey to blackish in color and are quite small with a spotty distribution.


Family: Centrophoridae – Gulper Sharks

Genus: Deania 

Species: quadrispinosa


Phylum– Chordata

Class– Chondrichthyles



Common NameDogfish Sharks

Family– Centrophoridae

Common Name– Gulpher Sharks




Average Size and Length: Adult males average are 2.9 feet, and adult females average 3.6 feet. The longest recorded is 3.7 feet.

Teeth and Jaw: There are compressed cutting teeth in both jaws, but the upper and lower teeth differ. The lower teeth are much bigger, broad and hooked slightly to a point. The upper teeth are much smaller, pointier and more come to a curved-hooked point.

Head: The snout is long and flat. The eyes are large.

Denticles: The dermal denticles are four-spine, pitchforked-shaped. They are large at .75mm long.

Tail: There is no subcaudal keel beneath the caudal peduncle.

Demographic, Distribution, Habitat, Environment and Range: The Longsnout dogfish can be found in southern Africa, Australia, New Zealand and the west Pacific Islands. They can be found over the outer continental shelf and slope between 492-4,462 feet, but typically prefer to stay below 1,312 feet. They are considered bathydemersal.

Diet: They prefer to eat bony fish.

Aesthetic Identification: The Longsnout dogfish ranges from grey to grey brown to blackish in color. Sometimes the edge of their fins are white. Juveniles have a dark blotch near the leading edge of the dorsal fin. The first dorsal fin is high, angular and short. The second dorsal fin is high, angular and taller with a higher fin spine. There is no anal fin.

Biology and Reproduction: The Longsnout dogfish is ovoviviparous. Litter size is thought to be between 5 and 17, but this is unconfirmed.

Behavioral Traits, Sensing and Intelligence: Unknown.

Longsnout Dogfish Future and Conservation: They are discarded as bycatch by fisheries. Populations of this shark have decreased by over 80% in some regions of Australia. Around the world they’re down by almost 30%.

Longsnout Dogfish Recorded Attacks on Humans: Not a threat to humans.