Lukas VFN 🇪🇺Discovery suggests that #RedAlgae use colors for inter-species communication https://phys.org/news/2025-05-discovery-red-algae-inter-species.html
"a certain kind of cells of red #algae contain bodies of tightly packed microspheres of a light-reflecting material. In the growth tips of the alga, these microspheres are all of the same size, which allows light of a single, blue color to be reflected... As the cells mature, the microspheres lose their uniform size, which causes light of all colors to be reflected, resulting in a whitish hue."
Discovery suggests that red algae use colors for inter-species communication
Some red algae exhibit structural color that gives their growth tips a blue hue and the rest of their bodies, including their fruiting structures, a white hue. Moreover, since the color-producing structures are located together with anti-herbivory chemicals, the Kobe University discovery is the first to suggest that red algae use colors for inter-species communication.