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.

--The person who noticed it on Gawker summed it up like this, quote, "This is no accident, [it's] hillbilly handfishing.  [And] I'd go so far as calling it animal cruelty."  (--Search for "Fish Grabs Man's Arm.")