Emma explains, 'With its large serrated teeth megalodon would have eaten meat - most likely whales and large fish, and probably other sharks. If you are that big you need to eat a ... almost squashed ...

when a fisherman hauled in a blue shark measuring a massive 271cm. Here they feed on other fish, such as mackerel, herring, squid and some bottom living species and scavenge on other creatures.

Blue shark, Prionace glauca ... Remarkably, the shark was alive, showing no signs of fresh puncture wounds and even had bait fish in its stomach, indicating recent feeding. But closer examination ...