Characteristics
The dumb gulper shark may grow to be 43 inches (110 cm) long and has a long, robust head, a long, flattened snout, large mouth and large, green eyes which help it see at 820 to 1260 feet (250 to 385 metres) under water. The body is slender and of moderate size, and is grey to greyish-brown in colour, with a paler underside. There are two dorsal fins, the first larger than the second, and each has a short spine, a white rear margin, and a dark blotch towards the front, which is more distinct in juveniles. The large caudal fin is asymmetrical, with a longer upper than lower lobe.
The broad teeth of this species differ between the upper and lower jaws, with the lower teeth being much larger. The teeth also differ between the male and female, with the male having much more erect, upright upper teeth, and upward-curving tips on the lowers. The dumb gulper shark is very similar in appearance to the closely related little gulper shark.
Read more about this topic: Dumb Gulper Shark