A grouper is a type of fish that can get HUGE if they live long enough, like 300 POUNDS.  And some guy posted footage of a pretty big one trying to eat a SHARK that looks like it's about four feet long.


In the video, the guy is reeling the shark in, which is when the grouper shows up.  Then it apparently tries to eat it in one BITE, and swims away.  You can't tell if it ACTUALLY swallowed it though.