DWARF gULPER sHARK

Small shark with smoother feeling skin

The Dwarf Gulper shark (Centrophorus atromarginatus) is a dogfish of the family Centrophoridae found in the Indo-West Pacific oceans, from the Gulf of Aden, Japan, Taiwan, and northern Papua New Guinea.

 

Family: Centrophoridae – Gulper Sharks

Genus: Centrophorus 

Species: atromarginatus

Taxonomy:

Phylum– Chordata

Class– Chondrichthyles

SubclassElasmobranchii

OrderSqualiformes

Common NameDogfish Sharks

Family– Centrophoridae

Common Name– Gulpher Sharks

GenusCentrophorus

Speciesatromarginatus

Status: IUCN Red List DATA DEFICIENT

Average Size and Length: Dwarf Gulper sharks are born between 30-33 cm. Mature males can grow over 1.3 feet and mature females 1.4 feet. The maximum recorded is at least 3 feet.

Teeth and Jaw: Both jaws have blade-like teeth. The upper teeth are without cusplets and the lower teeth are larger than the upper teeth.

Head: The snout of the Dwarf Gulper shark is thing and long.

Denticles: The skin is smoother to the touch. The dermal denticles of the Dwarf Gulper shark are wide placed and block-shaped. They are not overlapping.

Demographic, Distribution, Habitat, Environment and Range: The Dwarf Gulper shark can be found in the northwest Indian Ocean and the west Pacific in Japan, Taiwan Island and northern Papua New Guinea. Research suggests that their range may be wider. They can be found on the outer continental and insular shelves and upper slopes between 492-1,476 feet.

Diet: They more than likely eat bottom-dwelling bony fish, squid, octopus, and crustaceans.

Aesthetic Identification: The Dwarf Gulper shark is grey-brown or grey above and lighter ventrally. There are prominent blackish markings on most of the fins and sometimes all of the fins. The pelvic fins sometimes do not have these black markings. The rear tips of the pectoral fins are narrowly angular and elongated extensively. The two dorsal fins have large grooved spines. The first dorsal fin is short and it is higher than the second one. The spine base of the second is over the pelvic fin inner margins or the rear tips.

Biology and Reproduction: Unknown, but thought to be ovoviviparous.

Behavioral Traits, Sensing and Intelligence: Unknown.

Dwarf Gulper Shark Future and Conservation: Not enough data to evaluate, but they are caught for their liver oil.

Dwarf Gulper Shark Recorded Attacks on Humans: Not a threat to humans.