Originally Posted by Hallyx
Apparently the word iridescence carries a specific connotation in Betta breeding, a definition that is other than or beyond the common English language meaning.
Would anyone care to enlighten me? Thank you.
it depends on the color. The iridescents are actually a betta color and these colors have a reflective quality.. the blue/green/steels. So they have a bit of shine and that is what you want. To get an all blue/green/steel fish you actually have to have a spread iridescence gene. Otherwise you just get patches of these colors.
Black and red should not be any color but black or red. If you look at a black or red fish and they have specks of steel/green/blue they have iridescence.. not spread iridescence.. but scales that have a bit of another irid color on them. This is a huge fault on those colors as showing red on an iridescent fish is.
Things get complicated when you add a metallic gene.. and you get metallic blues, greens and turqs. You can also get metallic over the red.. though it usually is just hints of steel showing up.