I was think about my old pleco, Sandshrew, and another question came to mind about him, his aggression, he used to launch himself toward the surface of the water or wherever my hand was and would straight up attack me and any other human that got near the water! He never bothered any of the fish he was with rather they were big or small but I remember one time when I was doing a water change and he actually jump out of water, tried to latch on to my wrist like a lamprey and plopped back into the water! It seemed like really weird behavior so I started watching him more closely and realized that every time I opened the lid he would start sizing me up and if I even came close to touching the water at all he would come in for the kill, but again never bothered his tankmates. It started around the time he was 7-8 inches long. Has anyone else ever had a pleco act like this?