Not sure whats going on here, one of my Cardinals is swimming around with his mouth open. It was wide open the other day, now its just partially open. He's not acting unusual, breathing heavy, anything like that, and he is still eating greedily. Any clue whats going on here? Friend said he could be mouth brooding, but he's not specifically clear on this species brooding behavior.
If he is mouth brooding, I will be stunned because the second cardinal has only been in the tank for a week, and the one with its mouth open is 2 months old. Seems a little quick...
If he is mouth brooding, I will be stunned because the second cardinal has only been in the tank for a week, and the one with its mouth open is 2 months old. Seems a little quick...