The guy I got it form did not know anything about it really, He said they maybe poisonous to the touch, but was not sure. I traded him some base rock fragments i had left over from awhile ago. As for the mouths, I do not know that either, do i need to feed it or will the lighting be sufficient? Is it normal to close up when 1st introduced to a tank? I acclimated him over 4 hrs (In between working)? The levels are Ammonia 0 Nitrates 0 nitrites 0 PH 8.3. Thanks for the help already. One more thing, as it grows does it split or does it need to be fraged?