Gracilaria is a genus of red algae (Rhodophyta) notable for its economic importance as an agarophyte, as well as its use as a food for humans and various species of shellfish. Various species within the genus are cultivated in Indonesia.
Gracilaria is used as a food in Filipino, Hawaiian, Japanese, and Korean cuisines. In Japanese cuisine, it is called ogonori or ogo. In the Philippines, it is called gulaman and used to make gelatin.In Jamaica, it is known as Irish moss. In Korea, it is known as kosiraegi.