While it may seem like child's play, those things can go through an anchor rope faster than Superman. Then think of what they can do to you if they strike you...
CRIKEY!
wow I didn't know that. I caught a show the other day on one of the Science channels, and they where talking about 400lb Mantas' , they even showed them taking around 6 hours catching a 200lb one.
They just fascinate me. still I'd rather swim with a Manta, then jellyfish. those kinds of scientist are insane.
Stephen