Strange animal behaviour

In recent days I've seen a number of articles relating to animals with some strange behaviors.

Like a swan who feeds the Koi fishes in a Chinese zoo.
Here is a video of a baby duck feeding the fish. Maybe it's not that rare for birds to feed fish, but I wouldn't know why.

Then there is the article about a cat in England who rides the same bus three times a week and exits at the next stop.


And finally Octi the octopus who opens bottles, which has been documented before, but he is also very friendly and squirts water jets into the faces of his keepers.