Individuals are thought to live up to 80 years. Males average between 309–330 cm (10.14–10.8 ft) in length, and females are larger, averaging between 350 and 420 cm (11.5–13.8 ft) in length. The Bluntnose (H. griseus) is the larger of the two sixgill species, and indeed is one of the world’s largest sharks. Bluntnose Sixgill Shark (Hexanchus griseus), Information About Sharks, For Shark Lovers, Sharks Of The World Have Added Some Strange Items To Their Diet, Blue Shark Facts That Will Not Make You Blue, 5 Interesting Locations That Different Types Of Sharks Have Been Found. Bluntnose sixgill sharks are deep divers, cruising the continental shelf and submerging up to 2,500 metres but King says the B.C. It is also known by many other names, such as cow shark and mud shark. Female weight … The sixgill sawshark, Pliotrema warreni is a sawshark of the family Pristiophoridae. Fluorescent green eyes. In fact, this species appears to tolerate the presence of people. Only one dorsal fin. As a primarily deepwater species, the bigeye sixgill shark is usually found near the bottom substrate and may move toward the surface during the nighttime hours. Five broad, sawlike teeth on each side of the lower jaw. The Latin name is handy for precision, because there are so many other common names for this shark: Atlantic mud shark, brown shark, bull dog shark, bull shark, cow shark, gray shark, grey shark, mud shark, sixgill cow shark, sixgill shark, and sixgilled shark. The Sixgill Shark actually has the widest distribution of all sharks (well, the Great White might have it beat but it is close) and can be found all over the world in both temperate and tropical regions. Females reach maturity at a larger size of roughly 4 m (13 ft) / 400 kg (880 lbs), and they ultimately grow to be larger than males. Bluntnose sixgill sharks usually live in the deep sea, and have been observed at depth of almost 2,500 meters, according to Fisheries and Oceans Canada! It is one of four species belonging to the family Hexanchidae, sometimes called cow sharks. However, Sixgill sharks are not nearly as robust, so, therefore, not as heavy. A relatively small cow shark with a somewhat pointed snout, large green eyes and six gill slits. The sixgill is fished commercially and for sport throughout its range. They are generalists, feeding on a great variety of prey items that are likely ambushed at close range. Bluntnose sixgill sharks are believed to be primarily solitary animals and there is no information indicating whether they prefer one or many mates. Presence of 6 pairs of gill slits highlights this genus among sharks; outside Hexanchiformes order, Pliotrema is the only shark with more than 5 gill slits. The bluntnose sixgill shark (Hexanchus griseus)is a primitive and distinctive shark. By Haley Cohen Gilliland. For the past year, a research team has developed a new strategy to study the near threatened bluntnose sixgill shark in deep waters. From left to right: Pliotrema kajae, Pliotrema warreni, and Pliotrema annae. shark facts sawsharks sharks sharkfactoftheday 107 notes Bigeye sixgill sharks are found on continental and insular shelves at depths from 295-1,970 feet (90-600 m). Compagno, Leonardo, Dando, Marc and Fowler, Sarah. It has a broad, flat head, large green eyes, and a small, single dorsal fin far along its back. Their known diet includes small fish, crustaceans, and squids. Six gill slits are very long. These data are being used to describe the spatio-temporal patterns of behaviors expressed by top predators and other important members of the groundfish community in Puget Sound and along the West Coast. Quick facts about this giant deep sea shark. Better population estimates are clearly needed to facilitate management of this species. They were the sharks that were featured in a particularly dramatic scene in Blue Planet 2. The only observed predator of the sixgill sawshark is the tiger shark, though it is likely other large sharks predate this species. Shark attacks are extremely rare and account for four fatalities every single year worldwide. Distinguishing Characteristics Bigeye sixgill shark (Hexanchus nakamurai). The Bigeye Sixgill Shark has 6 pairs of gill slits, large eyes, comb-like teeth and a long upper caudal fin lobe. In life the eyes are bright green. (Throughout the rest of this article, “sixgill shark” refers to H. griseus). This is because of their restricted geographical range, small litters, high age of maturity, and extreme vulnerability to bottom trawling fishing. The Bluntnose Sixgill shark is a primitive, common, and distinctive shark that has six gills on each side of the body (most sharks have five pairs on each side of the face). vii + 33 pp. They are thought to breed annually, giving birth to around five to seven pups per litter. In some instances information doesn’t exist — it is general challenging to measure aquatic populations, and even more so for deep water fish. The sixgill sawshark is the only shark outside of the Hexanchiformes order (frilled sharks and cow sharks) to have more than five gill slits. Because of their deep habitat, sixgill sawsharks are not considered a threat to people.[2]. It has the blunt nose and largest hexanchoid shark that growing up to 7.9 m in length. Male sixgill sharks become mature at about 3 m (10 ft) long, when they weigh about 200 kg (440 lbs). In fact, some individual sharks may approach divers for a closer look without any display of aggression. The Bluntnose Sixgill Shark is a heavy-bodied species that occcurs in tropical and temperate waters worldwide from the surface to about 2500 m. Identification The species has a single dorsal fin, 6 pairs of gill slits and a blunt, rounded snout. The Bluntnose Sixgill may be the most widely distributed of all sharks, rivalled only by the White Shark (Carcharodon carcharias) Habitat benthic on continental and insular shelves and upper slopes, from the surface and the intertidal down to a depth of at least 8,200 feet (2 500 metres) Of course these interactions might be better classified as “anti-social”. These sizes correspond to estimated ages of 11-14 years for males and 18-35 years for females. The two new species flank the original known species. External parasites include copepods (tiny crustaceans) that feed on the shark’s head and fins. COSEWIC assessment and status report on the bluntnose sixgill shark Hexanchus griseus in Canada. Adults are very sensitive to and become distressed by light exposure — thus, they spend the day in the dark depths, and forage closer to the surface mainly at night. Bluntnose Sixgill Shark Bluntnose Sixgill Shark. At a mature length of about 14 feet, they are one of the top ten largest predatory sharks of the world – and they not only live in Puget Sound, they can often be found swimming directly below the Aquarium’s pier. It is found in the temperate tropical waters worldwide and have diet widely varied by region. In the western Atlantic Ocean, this range includes from North Carolina to Florida (US) and from the northern Gulf of Mexico to northern Argentina including Nicaragua, Costa Rica, and Cuba. From left to right: Pliotrema kajae, Pliotrema warreni, and Pliotrema annae. var js, fjs = d.getElementsByTagName(s)[0]; The sixgill shark prefers deep-water habitats, below 91 m (300 ft), though it can be found from the surface down to at least 2,000 m deep (about 6,500 ft). //