The Top Rough Longnose Dogfish (*Deania hystricosa*) is a deepwater shark species found in temperate and tropical oceans worldwide, recognized by its slender body, elongated snout, and rough skin texture. This elusive species inhabits continental slopes and seamounts at depths typically between 400 and 1,800 meters. The fishing industry targeting the rough longnose dogfish is relatively small compared to other commercial sharks, but it is primarily harvested as bycatch in deepwater trawl and longline fisheries. The main countries known for catching this species include Spain, Portugal, New Zealand, and Japan, where deep-sea fisheries operate. These nations often land the rough longnose dogfish alongside other deepwater sharks, with the catch used for meat, fishmeal, and sometimes liver oil. Due to its deep habitat and low reproductive rate, the species is vulnerable to overfishing, prompting some countries to implement management measures to regulate its harvest.
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Data from FAO. 2025. Global Capture Production. In: Fisheries and Aquaculture.