This video is a real insight into predator/prey relationships and has a quite unexpected result. The clip requires Realplayer and is not recommended for very young children.

http://www.pbs.org/wnet/nature/octopus/media_players_blue/shark_hi.html

Apologies, this link has already been posted by CarlS in this thread. Please delete the above.

http://www.tonmo.com/forums/showthread.php?t=4795&highlight=shark