COASTAL STAFF
We urge all coastal planning staff to educate themselves about the issue of Caulerpa and the risk posed by this seaweed to our coastal waters. The Cities of Carlsbad and Huntington Harbour were just the first to experience an infestation in their waters. Strains of both Caulerpa taxifolia and Caulerpa racemosa, species that are used nationwide in the aquarium trade, are easily surviving the cold winters in the wild of the Mediterranean Sea. Therefore, it is not just states with warm coastal waters that should be concerned. The aquarium strain of Caulerpa taxifolia has been shown to survive up to three months at temperatures as low at 50 degrees F, demonstrating just how hardy this species is.
California harbormasters, port captains, marine construction companies and coastal staff:
Review the survey requirement related to Caulerpa that may affect projects undertaken in the marine environment. Prior to conducting any activity that involves the disturbance of the bottom of southern California bays and harbors, the California Department of Fish and Game and National Marine Fisheries Service require that the bottom be surveyed for Caulerpa. Examples of such activities include: dredging, placement of mooring weights, realignment of aids to navigation, pile driving and placement of fill.
Click here to learn about Caulerpa survey requirements for coastal projects in southern California.
Many coastal states have placed restrictions on the transport or possession of Caulerpa, often designating it on a noxious weed list. Check your state’s pest plant control programs for information.
Click here to see a list of state and Federal regulations on Caulerpa.