Gracilaria is a genus of red algae commonly found in marine environments. It thrives in warm coastal waters and is often attached to rocks or other substrates. This algae is known for its branching, bushy appearance and can vary in color from greenish to reddish-brown. Gracilaria is economically important as it is harvested for its agar, a gelatinous substance used in food, pharmaceuticals, and laboratory settings. The cultivation of Gracilaria has gained attention due to its potential in sustainable aquaculture and its role in providing habitat for marine life.