Rhodophyta

Rhodophyta, commonly known as red algae, is a diverse group of marine and freshwater organisms characterized by their red pigment, phycoerythrin. This pigment allows them to thrive in deeper waters where sunlight is scarce. Red algae play a crucial role in aquatic ecosystems, providing food and habitat for various marine life. They are also used by humans in products like sushi (nori) and as thickening agents in foods and cosmetics. Additionally, some species contribute to the formation of coral reefs, highlighting their ecological importance.