We know they’ve got the appetite. We know they’ve got the teeth to back it up. And, we know the ocean provides them with a smorgasbord of menu items. But, if given their druthers, what do sharks eat?

On a clear, calm day, the water on Challenger Bank off Bermuda is so clear it looks like air. It is another atmosphere, separated from the one above it only by the thin silvery film of its surface.

The delicious tuna and swordfish that ends up on plates across South Florida puts a dent in more than just your wallet — catching them puts a dent in global shark populations. It’s common for sharks ...