[john70t]

An old girlfriend used to have about 8 of them, then 5, then 4, then............ all within a few months of overfeeding. There would be half-eaten carcasses on the gravel and still new ones missing. Mean little critters.
There probably was a lack of physical/visual boundaries for establishment of turf and/or places to hide for the little guys. They definitely need a big tank.

Either way, my gig is octapii: Smart as a dog. Will climb out of their tank, crawl across a table into another tank and eat all they can and return to their own afterwards. Can change a million colors depending on their mood, and grow protuberances to blend into the background at will. Can squeeze through anything their hard beak alows.