Johnson's Seagrass (Halophila johnsonii)

In 1998, Johnson’s seagrass was listed as a threatened species under the Endangered Species Act (ESA).  It is the first and only marine plant to be listed under the ESA.  Johnson’s seagrass was listed as threatened due to its limited geographic range and habitat loss.  This unique seagrass occurs in the coastal waters off the east coast of Florida, from just north of Sebastian Inlet south to Virginia Key in Biscayne Bay.

Contact Us

For more information about Johnson's seagrass, please contact: 
Adam Brame
Phone: (727) 209-5958


Did you know that Johnson’s seagrass and other seagrasses are important to the marine ecosystem.  Learn more about Johnson’s seagrass and how it provides food, shelter, and nursery habitats for a variety of marine life.

Although Johnson’s seagrass grows underneath the water’s surface it still requires sunlight to survive. Learn more about Johnson’s seagrass critical habitat.

Johnson's seagrass is the rarest species in its genus or category. It is threatened by poor water quality, coastal development, and dredging.

Key Documents