Update, pleco was deceased this afternoon. Female super red, had 5 or 6 spawns. In same tank with another female red and a male red and some sub adults. Possibly had been fighting had a mark on her side.

I think that two of the females BN Super Reds may have been fighting yesterday, they were acting a little strange. Today one is lying on its back.
Moved the fish with a net and it swam away. Any reason for them to lay upside down.
Exploreman