The Pacu LOVED the thawed frozen peas! He hid initially when I put in the food, along with the BP, both crowding that slate cave. I really ought to give him another "cave" since they're both crowding the only one.
Anyway, once I sat down and didn't move, he came out and looked at the peas then figured out it was food, he ate every last one up then started picking up gravel to see if it was food, so I gave him some more. Sure enough, he ate most but left a few. The BP just stayed in his cave the entire time. It's odd how colored up the BP is during the night and the morning when the light is out but becomes faded during the day. Maybe it's stress, maybe it's the bluish light...
I'm positive this is the most nutritious meal the Pacu's had in a long time. I called NC Asheboro Zoo and ran into a dead end. The people there weren't really friendly at all even after I'd told them the story. So I decided to try the smaller National Science Museum here in Greensboro. The people there were much more friendly and understanding. The Co-curator of reptiles and aquatics called me back since he'd been busy at the time, and said that I should try the owner of a fish store, Aquarium Center of NC. The owner may be able to help me locate a home for the Pacu and possibly the BP.
I'm not going to allow him to be resold in a pet store, but we'll see. I'll call tomorrow and update what happens.