The kids named him jaws. He's kinda a jerk. He's bitten me before and he wants to do it again. Tonight he's making it difficult to feed the bichirs. Jerk!
He might come after those polys, and any other tankmates, one he gains more size. As you've stated, they are agressive towards humans. That being said, I don't have to say what this guy has done to me, at only 8". From endless appetites, to a multi-hour stare, at one spot on the surface, waiting for a victim... dont let the dull look in their eye, fool you as them being dumb characins...they are killers. I feel like Jeremy Wade typing that...Feed it a live mouse, and watch irreversible behaviours set in. I love them. Here's Wolfie, as my Wife so affectionately refers to him/her