Johnson's Seagrass

A close-up image of Johnson's seagrass growing in sand.

Lori Morris, St. Johns River Water Management District

Johnson's seagrass (Halophila johnsonii) is the lone ocean plant species listed under the Endangered Species Act. Its flowing green stalks play an important role in coastal ecosystems, where they act as nursery grounds for small larval fish. They are also food for the endangered West Indian manatee and green sea turtle. See more endangered ocean species in our slideshow