I live on the east coast of Florida and I've had a couple of encounters
with the Portuguese Man Of War.  Though it looks like a jellyfish, it
isn't.  It's far more complex as this video, uploaded by slk320k on September 21, 2009, will show...


Egad!  I never realized that the tentacles hung up to 30 meters below the surface!  Gah!

And a little bit of advice: if you happen to see one of these things washed up on the beach, stay away.  Don't prod it with a stick, don't try to step on its gelatinous floating sack--just stay away.

More cool animal videos can be found here!