The Red and Yellow Layers in Betta Splendens Red and yellow coloration in bettas come from erythrophores and xanthophores. In the red layer, Extended Red is dominant and spreads red across the body, while Non-Red is recessive and replaces red with yellow, sometimes producing different shades like orange. Red Loss can cause red pigment to disappear over time, and the Variegated Fins gene creates variable butterfly patterns in the red layer. The yellow layer itself is less understood genetically, but it often follows red-layer patterns. #genetics #learn #bettabreeding #bettatok #fishtok #wickedbettas #STEM