Overview Species Guide Regulations Licenses Fisheries Data

Sixgill Shark

Also known as

Bluntnose Sixgill Shark, Cow Shark, Mud Shark

IUCN status

Near Threatened

About the Sixgill Shark

This prehistoric-looking shark is easily identified by its six long gill slits, a distinguishing feature among most sharks that only have five. It possesses a broad, blunt snout, large green eyes, and a single dorsal fin positioned far back on its body, close to the tail. Adults can reach impressive lengths of over 15 feet, sporting a grey, brown, or olive coloration on top that lightens to white or cream below. Their powerful, elongated body is built for cruising the deep.

Source: FishBase & iNaturalist

Habitat

The Sixgill Shark is a true deepwater dweller, primarily inhabiting the continental and insular shelves and slopes. They are typically found near the seafloor, ranging from shallow depths of a few hundred feet all the way down to over 8,000 feet, often making nocturnal ascents into shallower waters to feed.

Distribution

These impressive sharks boast a widespread, cosmopolitan distribution, populating temperate and tropical oceans across the globe.

Behaviour

Primarily nocturnal hunters, Sixgill Sharks ascend from the deep at night to forage for food in shallower areas. Their diet is diverse, including a variety of bony fish, other sharks, rays, squid, crabs, and even seals or carrion. While generally slow-moving, they are capable of surprising bursts of speed to ambush unsuspecting prey.

Edibility

★★★★★

The meat of the Sixgill Shark is generally not considered desirable table fare. It can have a strong, 'sharky' flavor, often described as ammoniated, especially if not bled and processed immediately. It is rarely targeted for consumption by recreational anglers.

Lure suggestion

Anglers targeting Sixgill Sharks require extremely heavy tackle due to their size and deepwater habitat. Large, natural baits such as whole or substantial cut sections of oily fish (like tuna, mackerel, or salmon heads), or ray wings, are most effective. These should be presented on the bottom using robust circle hooks or J-hooks, paired with heavy wire leaders and strong braided mainline, often deployed with deep drop rigs. Chumming can help attract these elusive predators.