Light diffraction by sarcomeres produces iridescence in transmission in the transparent ghost catfish
Abstract
We find the rainbow-like iridescence in the transparent ghost catfish to be the result of the diffraction by sarcomeres in transmission, which is distinct from most of the surface reflection structural colors previously reported in aquatic species. The muscle fibers work as transmission gratings, and the transparent skin works as an optically lossless protection film. The diffraction colors response dynamically to muscle relaxation and contraction as the fish swims, which enables the fish to show flickering iridescence in different angles. Our finds provide a new angle to reveal nature's secrets of structural colors.
- Publication:
-
Proceedings of the National Academy of Science
- Pub Date:
- March 2023
- DOI:
- 10.1073/pnas.2219300120
- Bibcode:
- 2023PNAS..12019300F