Invasive Seaweeds: Identification Guide and Flyer

Lindsay Marks; Carrie Culver
Publication Date

Help Monitor Invasive Seaweeds

Through, scientists are overseeing the monitoring of seaweeds (Sargassum horneri and Undaria pinnafida) that have invaded coastal and island reefs of California. Divers are encouraged to to help keep track of these invasions by reporting sightings.

Learn more about aquatic invasive species at

These outreach materials were developed as part of California Sea Grant Project #R/HCME-07 awarded to Dan Reed, Sally Holbrook and Carolynn Culver, Marine Science Institute, UC Santa Barbara, with additional support from the California Sea Grant Extension Program, NOAA Grant #NA14OAR4170075.