The evolution of colour-opponent neurones and colour vision.
D000200:Action Potentials; D000818:Animals; D002347:Carps; D003118:Color Perception; D006054:Goldfish; D009474:Neurons / Q000502:physiology*; D011896:Rana temporaria; D012160:Retina / Q000502:physiology*; D013053:Spectrophotometry