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.

There’s a reason ocean fishermen call sharks “the tax men.” And it is tax season, after all. A group of Stanford researchers recently were in for a massive—literally—surprise while on a recent ocean ...

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?

At the most recent round of Indian Ocean tuna talks, countries adopted measures to curb shark finning, expand the scope of bans that prohibit fishers from holding on to sharks caught as bycatch and ...