Reporting Site: Pelagic Sargassum in the Caribbean

Since 2011 massive quantities of pelagic Sargassum have occurred throughout the Caribbean, impacting aquatic resources, fisheries, shorelines, waterways, and tourism.

In the effort to better understand critical aspects of this phenomenon, this website serves as a data collection center to accommodate reports of large quantities of pelagic sargassum observed within the region during 2018. The website provides easy access for data entry and represents a service to those interested in contributing to the information database. Data provided to this site will be used by Gulf Coast Research Laboratory (GCRL) scientists and colleagues throughout the region to identify the source and examine the movements and causes of this extraordinary event.

Your participation is essential to this work. Please use this form to report your observations. Thank you.

Area of Interest

Click here to view the study area in a larger map.

Examples of Sargassum Observations

Click any image to see a larger version. 

Sargassum weed line
Sargassum line offshore
photo by GCRL
Sargassum mat offshore
Sargassum mat offshore
photo by GCRL
Sargassum washed up on shore in Barbados
photo by Hazel Oxenford

Participating Agencies, Institutions, and Organizations

These institutions have submitted pelagic sargassum reports.

1, agency, Amigos de las Tortugas Marinas, ATMAR Inc., ARC Atlantic Rally for Cruisers from Gran Canaria to St. Vincent participant.S.V. Dobro Dani, Barecat Charters , Centro de Estudios Ambientales de Cienfuegos, Centro de Investigaciones de Biologia Marina - CIBIMA Universidad Autonoma de Santo Domingo - UASD, CERMES, UWI, CINVESTAV Mérida, Commercial diver, Coral Bay Community Council , CORALINA, Dalhousie University (retired), DEAL Martinique (Direction de l'Environnement, de l'Aménagement et du Logement), Eco Hotel Restaurant Maya Luna, Fishing Pond Turtle Conservation Group, FoProBiM, Fundación Amigos del Caracol , Fundacion Plenitud, FUNDEMAR, GCRL, GIZ (German Agency for International Cooperation, Grupo Jaragua, HJR Reefscaping, Home rental, Hotel Cyvadier, Huracan Diving Lodge , Ifremer, Instituto de Ciencias del Mar y Limnología, UNAM., Instituto de Ciencias del Mar y Limnología. UNAM., Jana and Jan-Dirk Lohmueller , Jardines de Coral, Jobos Bay National Estuarine Research Reserve, Jobos Bay NERR, Luxury Cayman Villas, Margaret McEvoy, Mayan Beach Garden Hotel, Mustique Enviornment committee, N/A, N/A but cruiser in Grand Banks 49', M/V Bali Ha'i IV, National Environment and Planning Agency, NOAA, None, Ocean Futures Yucatan, Ocean Spirits Inc, (WIDECAST project), PADI, Parque Nacional Arrecife de Puerto Morelos (CONANP), Parque Nacional Arrecifes de Cozumel & Área de Protección de Flora y Fauna Isla Cozumel (CONANP), private citizen, Puerto Rico and Caribbean beach network, Red Hook Community Alliance, Research Triangle International, Research Triangle International - RTI, Royal Ocean Racing Club, Sailing with JODA, Save Our Sea Turtles (SOS) Tobago, Seven Seas Cruising Association, Seven Seas Cruising Association (as a volunteer) but in this case helping a member vessel. or donna blog offshore daily is, SOS Tobago, SSCA, St Eustatius National Parks Foundation STENAPA, St. Kitts Marriott Resort, STAR Program (Cal Poly's STEM Teacher and Researcher Program-, TMM Yacht Charters, Belize, UConn Marine Sciences Dept. (-2010) NASA Goddard Space Flight Center (-2014), UNAM, university od pUerto rico marine sciences, University of Benin, Benin, Nigeria, University of Maryland Eastern Shore, University of São Paulo, USFWS, Victoria House Resort, San Pedro, Belize, Vieques COnservation & Historical Trust, Virgin Islands National Park, Waitt Institute, Yellow Bird Hotel,