To understand what the sharks were eating over longer periods, the researchers analysed shark body tissue.

"Although black-tip, white-tip and grey reef sharks have long been thought of as top predators, we found that the chemical structure of the sharks' body tissue actually matched closely with that of large reef fishes such as groupers, snappers and emperors," Dr Frisch said.

"This result tells us that reef sharks and large fishes have a similar diet, but they don't eat each other. So rather than eating big fish, reef sharks are eating like big fish."
https://www.sciencedaily.com/release...0222105514.htm

We could have told them that.

Problem is, if you read the article it sounds like the goobermint is going to use this information to place more limits on the damn things. I understand that the apex predators are overfished, but these little guys are breeding like rabbits.