Many species of sharks, including the great white, also devour their siblings in an early age to help growth.
Tom Fletcher, honorary research fellow in palaeobiology at the University of Leicester, wrote for The Conversation: “It is very likely that the babies’ growth was fuelled by cannibalism of their unhatched siblings, a sinister conveyor belt of high protein snacks for hungry pups.
“It is unknown exactly how many megalodon embryos were produced.
“In basking sharks today, millions of eggs are created and sent to be fertilised. The hatched embryos begin to eat the surrounding eggs and in some cases, like the sand tiger shark, they eat other embryos too.