The longhead catshark is caught incidentally by deepwater trawl fisheries, though no specific information is available.

Apristurus longicephalus (Longhead catshark)

The longhead catshark is unique among Apristurus species in that the duodenum is not short but almost as long as the spiral valve intestine.

The first known specimen of the longhead catshark was captured in Tosa Bay, Kochi Prefecture, Japan on May 12, 1972.

The longhead catshark or smoothbelly catshark (Apristurus longicephalus) is a species of catshark, family Scyliorhinidae, with a patchy distribution in the Indo-Pacific from Mozambique to southern Japan to northern Australia.

Records of the longhead catshark are patchy and widely spread in the Indo-Pacific region: it is known from the East China Sea, southern Japan, the Seychelles, the Philippines, Mozambique, New Caledonia, and northern Australia off Townsville, Ashmore Reef, and North West Cape.

Apristurus longicephalus (Longhead catshark)

The longhead catshark or smoothbelly catshark (Apristurus longicephalus) is a species of catshark, family Scyliorhinidae, with a patchy distribution in the Indo-Pacific from Mozambique to southern Japan to northern Australia.