How Do Fish Change Colors? Mechanisms Behind Color Shifts

Fish Color Change

Fish change colors through several mechanisms:

  • Chromatophores: Pigment cells that disperse or concentrate melanin, carotenoids, and pteridines.
  • Reflectors: Iridophores scatter light to create iridescent colors.
  • Structural changes: Altering skin ridges or scales to change patterns.
  • Hormonal control: Hormones influence pigment distribution in response to environment or social cues.
  • Camouflage: Matching surroundings to avoid predators.
  • Communication: Signaling during mating or dominance displays.