Myliochimorpha Benthos

This deadly bottom-feeder that eats smaller fish (although most fish are small to this animal). The scientists just grabbed some stingray DNA and threw in some Ankylosaurus, Megalodon and any other predator they could find. Unfortunately, it bred fast and now swims in hordes at the ocean floor, eating all animals it comes across. being larger than a shark, it can easily eat a full grown human. As usual, "life finds a way".