Although Greenland sharks are not typically aggressive, they are most definitely some of the largest sharks on the planet. While quite a bit of mystery remains regarding this enormous and elusive fish.
Fortunately, this particular species of sharks are no longer commercially harvested. In the past, these sharks were commonly hunted for their livers in Greenland, Norway, and Iceland, however this is not nearly as customary today. Inuit hunters do eat these sharks, but their meat is not a widespread delicacy for a few reasons: they are almost always in freezing waters, and their meat has to be prepared a certain way due to the fact that it is poisonous when fresh. When the sharks travel to rivers such as those in Canada, Canadian fishermen who are harvesting halibut, or other types of fish sometimes catch them. However, we can be grateful for the fact that humans have not caused the population of Greenland sharks to almost completely deplete, which is the case for so many other shark species.
Now there are a few different types of hammerheads, but the Great Hammerhead is by far the largest of the nine species of this shark. In fact, these hammerheads can grow up to a length of 20 feet (5.5 m), and they can weigh up to 1,000 pounds (450 kg)! The coloration of the Great Hammerhead can range from gray-brown to green on their dorsal sides, and off-white on their ventral sides, and their teeth are extremely jagged and triangular.
Great Hammerhead Sharks are not particularly targets for commercial fishing, however, they are often bycatch victims. Humans treasure the fins of these sharks, but they also consume fresh, dried-salted, fresh-frozen, and smoked meat that is taken from other parts of the Great Hammerhead Sharks’ bodies.
The Thresher Shark is also known as the Alopias Vulpinus or Fox Shark. Its name comes from the sharks unusually large tail (caudal fin), which is in most cases, as long as the shark itself!
Today, there are three living species of this Shark:
But experts are still puzzled about the possible existence of a fourth species. This mystery continues to elude enthusiasts, but many believe it’s only a matter of time before this fourth species is confirmed.
The largest known Thresher Sharks reach a length of more than 6 meters (20ft) and weigh 600 kilograms (216 pounds). Bigeye Threshers are normally the largest with Pelagic Threshers being the smallest.
These are slow growing sharks. They reach their maturity between 8 and 13 years old and live about 22 years. Again, there is quite a bit of mystery here. Some believe this shark is capable of living much longer, but simply hasn’t been verified.
This species poses very little threat to humans. The largest threat of injury is divers getting hit with the enormous tail. Attacks of any kind on humans are almost unheard of.
The Bluntnose Sixgill Sharks are primitive sharks (genus Hexanchus) belonging to the Hexanchidae family (“cow sharks”). These deep-water predators are distinguished by the following features: they have six pairs of long gill slits on each side of their broad head, comb-like, yellow lower teeth, and a long tail.
Male sixgill sharks become mature at about 3 m (10 ft) long, when they weigh about 200 kg (440 lbs). 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. These sizes correspond to estimated ages of 11-14 years for males and 18-35 years for females.
The Bluntnose sixgill shark is not known to target humans. According to the “International Shark Attack File”, only one provoked attack has been reported since the 1500s.
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