a few different morphs are found in the lake
apparently the more solid yellow ones all come from an original pair from a small colony in the lake, major line breeding
some morphs have a faint barring on their sides, some are a whiter fish with black top fin and blue sheen when breeding
i think from memory their scientific name means blue
i had 4 fish at 6 to 8 inches the photo is of one of the youngsters off them