What organisms are producers in a coral reef food web?

In a coral reef food web, the primary producers are mainly phytoplankton and macroalgae, as well as symbiotic zooxanthellae, which are algae that live within the tissues of coral. These organisms utilize sunlight to perform photosynthesis, converting light energy into chemical energy, which forms the base of the food web. Additionally, seagrasses can also contribute as producers in some coral reef ecosystems. Together, these producers support a diverse array of herbivores and higher trophic levels in the reef ecosystem.