An Aba Aba will develope a very distinct personality and recognize the owner. Mine hides from everyone but when I am alone in the fish room he watches me the whole time. If someone else feeds him he will hide and eat when they leave. He begs for food like a dog with me. He also patrols the tank like a shark. I agree with previous posters in the fact that it looks cool how effortlessly they glide through the water, either foreward or backward quickly.