My Betta and my Panchax watch me all the time. Especially the female Panchax. If I'm doing anything on the tank I look up and she's right in front of me wriggling back and forth as fast as she can.
My Betta will swim to the front of the tank and do the same any time I walk through the room.
All food related I'm sure! They know where it comes from.
yep, my angels watch me too ... the female especially at the moment - she's such a mardy mare right now! My glass is filthy and I know the best way is to clean it is with a razor blade but I know if I try she will start attacking the blade and I'll have to give up for fear of her getting cut up.
The rest of my fish dart off when I'm near the tank ... just my angels that are inquisitive ... they swivel their eyes too!
My flame tetras (I call them the nosy neighbors of the tank) always have to taste my arm whenever I have to reach in for any reason. Hey, it might be food, you never know if you dont try, right? Ha ha!