| Speckled catshark | |
|---|---|
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Division: | Selachii |
| Order: | Carcharhiniformes |
| Family: | Pentanchidae |
| Genus: | Halaelurus |
| Species: | H. boesemani |
| Binomial name | |
| Halaelurus boesemani S. Springer &D'Aubrey, 1972 | |
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Thespeckled catshark (Halaelurus boesemani) is a species ofshark belonging to thefamilyPentanchidae, the deepwater catsharks. It is found in theGulf of Aden and off the coast ofSomalia. It occurs at depths of between 37 and 250 m (120 and 820 ft). Its length is up to 48 cm.
In the past, this species was thought to occur both in the western Indian Ocean and in the waters aroundVietnam, thePhilippines,Indonesia, andWestern Australia, betweenlatitudes21° N and26° S. However, two new species ofHalaelurus have been described from these latter areas, and the speckled catshark is now thought to be restricted to the western Indian Ocean.[1]
The speckled catshark grows to a maximum length of about 48 cm (19 in). It has a pointed snout, small mouth and raised gill slits. The front of the first dorsal fin is situated above the hind third of the pelvic fin, while the front of the second dorsal fin, which is about the same size as the first, is situated above the hind third of the anal fin. The back and the base of the tail have about eight irregular, dark saddle-shaped markings, and there are dark blotches on the dorsal and caudal fins and many small dark spots on the back, flanks and fins.[2]
The speckled catshark is known from theGulf of Aden, and off the coast ofSomalia, with a separate population extending from Viet Nam and the Philippines, through Indonesia to Western Australia. It is ademersal species, living oncontinental shelves and insular shelves, with a depth range of between 37 and 250 m (120 and 820 ft).[3]
The reproduction of this species of shark has been little studied. Four eggcases have been found inside the oviduct of a female but it is unclear whether the eggs hatch internally, or the cases are deposited onto the seabed and the eggs develop there. The length of the juvenile at birth/hatching is 7 cm (2.8 in) or more.[2]
The speckled catshark is poorly researched and the threats it faces are unclear. Fisheries in Somalia are largely unregulated, with foreign-owned vessels fishing illegally. Artisanal fisheries are unlikely to target this species because of its small size, nevertheless it is vulnerable to being caught asbycatch in both trawling and netting operations. TheInternational Union for Conservation of Nature considers that there is insufficient evidence to understand the conservation needs of this fish and have classified it as "vulnerable".[1]
