These studies show that we still have so much to learn about sharks, animals that have populated the earth’s oceans since prehistoric times.
Studies of sharks that were alive when nuclear bombs were tested in the 1950’s and 1960’s show that radioisotopes were present showing the shark to be at least 65-years old. This was more than twice as old as their growth bands suggested. These new studies suggest that shark species like the Great White shark may live to be 300 years old.
If you are a fan of the television series The Blue Planet you will have been spellbound by the amazing pictures of life in our deepest oceans. The series has revealed that there is previously undiscovered life in even the deepest and darkest parts of the ocean. These discoveries reaffirm just how much we still have to learn about oceanic life. In fact, it is often claimed that we know more about the surface of the moon than we do about our deepest oceans.
Sharks often called “the denizens of the deep,” are one of the longest-lived species on our planet. As reported by the Inquisitr last week, Portuguese scientists were amazed when they captured a “shark from the age of the dinosaurs” off the Algarve coast. The rare frilled shark was caught by a trawler from the country’s Institute for the Sea and Atmosphere, and scientists claim that the unusual species has survived virtually unchanged for 80 million years.
Of course, sharks are not the only sea creature that dates back for millions of years. Scientists claim that horseshoe crabs date back even further than the frilled shark. According to Newsweek, scientists estimate that the horseshoe crab has been around for 450 million years, long before sharks, or the first cartilaginous fish had even been born. The Coelacanth, a huge night sky colored fish, dates back over 400 million years and is still swimming in our deep oceans today. To put that into perspective, these animals predate the dinosaurs by 170 million years.