Gigartina serrata
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Gigartinales
- family: Gigartinaceae
- genus: Gigartina
- species: Gigartina serrata
La Jolla- Newport Beach
- San Diego
California
United States
Gigartina serrata La Jolla Newport Beach San Diego