Purchased a pair of these yesterday, 1 looked sick and beaten up so I removed him and located him in my 24 gallon nanocube. I don't know if they fought for territory? I've never seen this happen before and am lucky enough to even remember to take pictures. He was dead before I snapped these pictures trust me I would've pulled him outta there. I did however find the other fish to be perfectly ok and healthy under a rock in my display tank. So here goes
17 minutes later
full belly
17 minutes later
full belly