mmmm... I've seen this. One time I was at an LFS, and they had the baby angelfish in with the baby pike... and as I was picking out which angels I wanted, the best-looking one was up in front, distracted by my finger (I was checking him out) and then comes the pike and grabs onto his eye! I screamed in the store... but by the time a store employee got to him, the pike had succeeded in ripping out the angel's eye. The pike was immediately removed from the tank with angels... I duno where they ended up putting him.