Mine is getting bolder day by day. I put a hot Magnum filter on its tank to "polish" the water after one of the 30-50% water changes I do once a week. I pointed the output of the filter at the front of its PVC hiding spots, directly at its face, just to mess with it and make it swim a little bit more. I came back into my fish room when my daughter called to me from inside. The Aba was swimming up to the filter tubes and when it found out which one was making the current, it was biting on the plastic end where the water was coming out of. I really see intelligence in it more and more, every day.!!!P.S. I moved the flow off of the Aba, and it was business as usual. Crazy, huh!!! Thanks.