that first one was crazy, they must have used infrared to find the octopus.
i've seen the shark octo video before, they put the shark in the tank to see how the octopus kills them, morally wrong to me, waste of a rare animal.
if you think about it, really the shark didn't stand a chance with those 8 (octopus have incredibly strong) arms coming at you, and if the sharks mouth is taken care of, what's he gonna do.
one creature that humans may fear, is just another animals prey...
"Atrocities are not less atrocities when they occur in laboratories and are called medical research."
George Bernard Shaw