I had a pet octopus in my classroom. I once dropped 5 goldfish in at once, and it reached out and grabbed them all at the same time. The have a distributed "brain" so that each arm can think independently, even if it becomes severed.Neat little story from local waters.
How to get a hickey from an Octopus.
VIDEO: A sucker for a friendly face; octopus gloms onto diver for once-in-a-lifetime encounter – Campbell River Mirror
I used to hunt these guys to make spending money back in 1962-63.
Really neat critters.