ok, i had a pet centipede and i dont know about the ones you bought but mine was extremly venomous and could either bite from the front or sting from the back. a mouse i threw in once creeped up from behind him and he tagged it with his back two legs. so good luck pickin these things up man. i barly ever took the top off his tank man, only animal i ever had that scared the **** out of me. i wouldnt put one near a fish that i liked.