Sharks usually referred to as “the denizens of the deep,” are one of many longest-lived species on our planet. As reported by the Inquisitr final week, Portuguese scientists have been amazed once they captured a “shark from the age of the dinosaurs” off the Algarve coast. The uncommon frilled shark was caught by a trawler from the nation’s Institute for the Sea and Atmosphere, and scientists declare that the weird species has survived just about unchanged for 80 million years.
If you’re a fan of the BBC tv sequence The Blue Planet you should have been spellbound by the superb footage of life in our deepest oceans. The sequence has revealed that there’s beforehand undiscovered life in even the deepest and darkest elements of the ocean. These discoveries reaffirm simply how a lot we nonetheless should find out about oceanic life. In truth, it’s usually claimed that we all know extra in regards to the floor of the moon than we do about our deepest oceans.
Of course, sharks aren’t the one sea creature that dates again for thousands and thousands of years. Scientists declare that horseshoe crabs date again even additional than the frilled shark. According to Newsweek, scientists estimate that the horseshoe crab has been round for 450 million years, lengthy earlier than sharks, or the primary cartilaginous fish had even been born. The Coelacanth, an enormous evening sky coloured fish, dates again over 400 million years and remains to be swimming in our deep oceans at present. To put that into perspective, these animals predate the dinosaurs by 170 million years.
Sharks maintain a particular fascination for scientists, partly due to their fearsome status, but in addition as a result of they’re so long-lived. As reported by National Geographic, a scientific examine claims that the Greenland shark is the longest-lived vertebrate on earth. The Greenland shark inhabits the deep and chilly waters of the North Atlantic, and a examine means that they may have a lifespan of as much as 500-years.
Scientists declare that the Greenland shark doesn’t even start breeding till it reaches 150 years of age. A newer article by National Geographic factors out that figuring out a sharks age shouldn’t be an actual science. Scientists have historically relied on counting calcified progress bands that type on a shark’s cartilaginous vertebrae. Recent research have urged that carbon relationship radioactive isotopes within the shark’s progress bands.
Studies of sharks that have been alive when nuclear bombs have been examined within the 1950’s and 1960’s present that radioisotopes have been current exhibiting the shark to be not less than 65-years outdated. This was greater than twice as outdated as their progress bands urged. These new research counsel that shark species just like the Great White shark might stay to be 300 years outdated.
These research present that we nonetheless have a lot to find out about sharks, animals which have populated the earth’s oceans since prehistoric occasions.[Featured Image by Awashima Marine Park/Getty Images]