Shark Week will have some new additions this year: Scientists found the first hybrid sharks in the world—57 of them—off the coast of Australia. The animals are a cross between the Australian blacktip shark and the common blacktip shark, and their existence may show that sharks are adapting to climate change, CNN reports. While such interbreeding occurs among fish, which lay eggs, it's more deliberate among sharks, which physically mate, notes a scientist.
Another researcher notes that the discovery could also mean that other shark and ray species are doing the same inter-breeding. DNA testing confirmed the hybridization of the sharks, and further testing will determine their fitness. "Wild hybrids are usually hard to find, so detecting hybrids and their offspring is extraordinary. To find 57 hybrids along (1,200 miles) of coastline is unprecedented," the researcher says. (Read more sharks stories.)