What the hell do fish do all day, anyway?

[Rabrrrrrr]

Now that I have fish, I find myself loving to watch them, but find myself often asking "What the hell are they doing?"

Other than when they're eating, or snarling (fish equivalent) at each other, they really aren't doing anything except what appears to be random swimming around.

Do you think they're having fun? Are they bored? Do they have enough intelligence ot have fun or to be bored? (personally, I think they DO know how to have fun - I've watched them play in the filter output stream).

There's lots of swimming going on, but I wonder - what the hell are they doing?

I feel that I should be trying to entertain them somehow, like with a chew toy, play some fetch, or something. I realize I can't...and I know that in the wild the fish don't really do anything, either.

But my good-mannered midwestern upbringing makes me feel I have some responsibility to entertain them. :-)