new perc--stressed?

[purplexfiles]

Yesterday picked up two true perculas, one is larger than the other. The larger one is doing fine, swimming and eating. The smaller one seems to be stressed--the fins on the underneath side are tucked in and he hasn't eaten.
Any suggestions?
Tank perameters are good. No signs of white on him.

 

[impulse]

The larger is the female, which is always the most aggressive. She is probably bossing him in their new surroundings - you may even see him "shuddering", which is their language of submission. Give him time to settle.