A broadscale benthic survey of Loch Creran was carried out in 1998-1999. The primary objective of the study was to map the sublittoral habitats and delimit biotopes. AGDS was used, ground-truthed by grab sampling, ROV, diver video and stills photography.

"This dataset provides a map of benthic habitats in the nearshore waters of St. Croix in the U.S. Virgin Islands. The Biogeography Branch of NOAA/NOS/NCCOS acquired aerial photographs of the nearshore waters of Puerto Rico and the U.S. Virgin Islands in 1999. These images, along with field sampling for validation, were used to create geographic information system (GIS) maps of the study area's coral reefs, seagrass beds, mangrove forests, and other important marine habitats. Mapped areas encompass the insular shelf between the shoreline and shelf edge, except where turbidity prevented visualization of the bottom. NOAA's partners included: Government of the Virgin Islands Department of Planning and Natural Resources (VIDPNR) Commonwealth of Puerto Rico, Department of Natural and Environmental Resources Caribbean Fisheries Management Council National Park Service NOAA, National Geophysical Data Center NOAA, Coastal Services Center NOAA, National Geodetic Survey St. Croix Environmental Association NOAA mapped 21 distinct benthic habitat types within eight zones and added these data to a GIS using visual interpretation of orthorectified aerial photographs. NOAA mapped benthic features that covered an area of 490 m2?in the U.S. Virgin Islands, including 300 km2?of coral reef and hard bottom, 161 km2?of submerged vegetation, 24 km2?of unconsolidated sediment, and 2 km2?of mangroves. Since 2002, these maps have been used for a wide range of applications, including: coral reef monitoring, marine protected area design, fisheries assessments, and student projects."