A video of a huge fish clamping down on a guy's arm in the Florida Keys is getting passed around the Internet right now.  But someone on Gawker.com pointed out that it's not what it looks like . . . and the guy's probably just a jerk.

It happened at a place called Robbie's Marina, where you can hand-feed a type of fish called a tarpon, which grow up to eight feet long.  And at first glance, it looks like one of them tries to swallow the guy's entire FOREARM.

But if you look closer, you can see him immediately take his other arm and hook it through one of the gills.

This looks like what they call it in Eastern Kentucky, hillbilly handfishing.  [And] I'd go so far as calling it animal cruelty."