Hi, I need some help. I have a small colony of demasonis for 2 months now. most of them are 4 cm, 5 cm at best. Today while cleaning tank, i noticed 1 of them had a swollen lower jaw, like holding something in the mouth. It refused to feed when i feed them. But at 4 cm surely, can they breed at such small sizes?
if so, i need some advice about breeding. do i take it out, or should i leave it in the main tank. trying to catch a 4 cm fish in a tank full of rock work would be a b****. cheers.