The endosymbiosis between cnidarians and photosynthetic dinoflagellates of the Symbiodiniaceae family forms the foundation of coral reef ecosystems. Prolonged environmental shifts can disrupt the cnidarian–Symbiodiniaceae partnership, triggering dysbiosis and coral bleaching and ultimately resulting in coral starvation, mortality, and the collapse of reef ecosystems. Despite its significance, critical gaps remain in our unders...