longnose spurdog

Small shark with a pointed snout and a long spine

The Longnose spurdog (Squalus blainville) is a member of the family Squalidae, or common name Dogfish shark, found over continental shelves in many oceans, at depths of between 49-2,625 feet. They reach 3.3 feet in length.


Family: Squalidae – Dogfish Sharks

Genus: Squalus 

Species: blainville


Phylum– Chordata

Class– Chondrichthyles



Common NameDogfish Sharks


Common Name– Dogfish Sharks




Average Size and Length: Longnose spurdogs are born around 9 inches. Mature males on average are around 1.6 feet, and females 2 feet. The maximum length is between 2.6-3.3 feet.

Head: The Longnose spurdog has a broad head with a relatively short, broad snout. They have large medial barbels on the anterior nasal flaps.

Demographic, Distribution, Habitat, Environment and Range: The Longnose spurdog can be found in temperate to tropical seas in the east Atlantic and possibly west Pacific. They are found on or near the muddy bottoms of continental shelves and upper slopes from 52.5 to more than 1,444 feet. 

Diet: They eat a variety of bony fishes, crustaceans, and even octopi.

Aesthetic Identification: Longnose spurdogs have heavy bodies. They are greyish brown with white-edged dorsal fins. The posterior pectoral fin margins are nearly straight to almost shallowly concave. They have narrowly rounded rear tips. The first dorsal fin is high, and its origin is just behind the pectoral bases. A very heavy long spine originates over the inner margins of the pectoral fins.

Biology and Reproduction: The Longnose spurdog is ovoviviparous. They have 3-4 pups per litter.

Behavioral Traits, Sensing and Intelligence: They are known to form large schools and shoals.

Longnose Spurdog Future and Conservation: Not enough data to evaluate.

Longnose Spurdog Recorded Attacks on Humans: Not a threat to humans.