That's a big octopus. I had the good fortune to watch this guy emerge from its refuge and slink across the pool. As I was watching its tentacles disappear, I heard a thrashing from the next pool over. I hopped up to check it out and saw the octopus was killing a pretty sizable fish. I thought I was recording video of the whole things and felt pretty awesome about it, but then realized I had forgotten to hit record. Le sigh.