Casper loves fish! Everytime I take him to Petco we go by the fish and he stares. I used to have a saltwater aqarium, but one fish got a disease and killed all the others.
I haven't started it up again.
Not Maltese Related: We have a Golden Retreiver, and we used to have a hampster. Kelly(The Golden Retreiver) would drool at the hampster in his cage for hours. He never really understood that it was the hampster in the little plastic ball.