Despite the danger of shallow water, (nowhere to run or hide) this Octopus in Italy succumbed to his natural curiosity about the activity near shore.

http://photography.nationalgeographic.com/photography/photo-of-the-day/octopus-vesuvius/

This is real. Also, octopi can live out of water for quite some time so it doesn't matter how shallow the water is. Look it up if you don't believe me.