Harrisson's Dogfish

This deep-water shark is a slow-growing, slender species with a pointed snout, large green eyes adapted for low-light conditions, and two dorsal fins each armed with a stout spine, characteristic of the family Centrophoridae. Like other gulper sharks, it likely feeds on bony fishes, cephalopods, and crustaceans on or near the seafloor, and probably plays a role as a mid-to-upper trophic level predator in continental slope ecosystems. Reproduction is presumed to be ovoviviparous, with very low fecundity, producing few offspring over long intervals, a life-history trait typical of this genus that limits the species' capacity to recover from population declines.

Harrisson's Dogfish occurs in the southwestern Pacific, with confirmed records from Australia, New Zealand, and New Caledonia. It inhabits deep continental slope waters, generally at depths associated with outer shelf and upper slope habitats, though its full habitat requirements have not been formally assessed.

The principal threat is ongoing commercial fishing, particularly bycatch in deepwater trawl and longline fisheries targeting other species. Because gulper sharks mature late and reproduce slowly, populations subjected to sustained fishing pressure show limited ability to rebound, and historical catch data indicate substantial declines in parts of its range.

Conservation responses include fishing closures and management measures in parts of Australian waters, where the species has been identified as a priority for protection, along with restrictions on retention in some fisheries. Enforcement and monitoring across its broader range, including international waters, remain limited.

Given its slow reproductive rate, continued exposure to fishing mortality, and documented historical declines, the species' population trend remains decreasing, and its long-term recovery outlook depends heavily on sustained and expanded management action across all range states.