it sounds like you're trying to ID your gourami based on color. IMO, with fish like dwarf gouramis who have such a vast range in color from all the selective breeding done within the species, its just easier to ID based on body type. it sounds as if you are describing some sort of color morph of a dwarf. I also doubt an opaline or blue would tolerate a betta sharing the same strata in their tank.
is it a shorter, stocky fish? or is it a little longer and leaner? how large is it? if its over 2.5", I'd be willing to bet it was an opaline or blue, but if its around there or under, then its probably a dwarf.
is it a shorter, stocky fish? or is it a little longer and leaner? how large is it? if its over 2.5", I'd be willing to bet it was an opaline or blue, but if its around there or under, then its probably a dwarf.