I think any animal has some what intelligence. If not, then they couldn't exist. Darwinism, theory of survival of the fittest. If fish were incapable of doing a intelligent procedure then they would die off like nothing. Feelings on the other hand, its hard to say because i think its a matter of opinion. I believe they do because if not, they would sit around not doing anything. Why would a fish play tag with another fish if there was no enjoyment in it. It is not necessary to its life to play tag, the fish does it because it wants to and enjoys doing it.