[bitwize]

Octopuses have been known to:

* unscrew the lid of a peanut butter jar to get a treat without training

* hop from one tank to another to prey on the fish in the tank. This was observed quite by accident and not part of an experiment at first. In fact the octopus waited for its human handlers to leave the room before going in for the kill; the incident was caught on camera.

* gently grasp the hand of a friendly human with their tentacles, and squirt water through their siphon at a disliked human

All spontaneously, without training or prompting.

That last bit is particularly interesting to me, because they are recognizable signs of affection and dislike. Octopuses show some semblance of an ability to bond with us, despite having vastly different brains from us.