I had a pair of oscars that would circle my hand, much like a cat does with your legs. It took them a while to learn, but I was able to hold a feeder by the tail and one of the oscars would jump up to get it. I only did that a couple of times because I felt bad for the feeders. But it got to the point where it was harder to clean because they would not leave my hands alone, kept circling and getting in the way. I had those ones for well over 9 years...I think they were about 11? when they died. and something that size is really hard to clean around when they refused to move. there was one feeder that they both let live, and it got to be large too. they became friends with it which I thought was odd. I finally had to give it to a friend that had a pond.
I've also had mutant fairy cichlids. I felt sorry for them because their mouths were really disfigured. I bought both of them and they lived for quite a while. They stayed hidden most of the time, in their lil cave. But they got to know that I was the one bringing food, so they would come out when I walked in the room. They acted like they had never eaten before....much like how my dog acts....
