Sharks are one of the most frightening creatures in our oceans. But they are equally fascinating. There are an estimated 350 known species of sharks, with a great range of shape and size. Get ready to see one of the biggest great white sharks ever caught on film. At over 20 feet long, this massive female great white shark named Deep Blue is almost as long as a fishing boat and specialists think it could be at least 50 years old. With a massively swollen belly, Deep Blue is heavily pregnant and likely to be hungry. Take a look:
