Wasn't it Haywood Jablowme who wrote:

A number of years ago, my next door neighbor worked as an Aquarist at
Sea World (in Orlando, Florida). He told me that this actually
happened there. An octopus was observed leaving it's tank, "walking"
about 5 feet, entering another tank, catching and eating a fish, and
returning to it's tank. As unbelievable as it sounds, according to Sea
World Orlando, this is an established fact. These are indeed very
intelligent animals.

Well yes, we started from the idea that there are lots of friend-of-a-
friend type stories about this.

--
Mike Williams
Gentleman of Leisure