The grouping of fish visual pigments about preferred positions in the spectrum.
D000222:Adaptation, Physiological; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D004777:Environment; D005399:Fishes; D066298:In Vitro Techniques; D008027:Light; D012168:Retinal Pigments; D013053:Spectrophotometry; D014801:Vitamin A
D012168:Retinal Pigments; D014801:Vitamin A