The utility and biases of the Roving Diver Technique (RDT) and transect visual surveys are evaluated for use in rapid assessments off southeastern Hispaniola. Both methods are similar in recording the most abundant species, while a greater number of rare species (especially fishery-targeted species) are recorded with the RDT. The methods are found to be complementary, and are suggested to be used together when conducting rapid assessments of fish assemblages, especially to detect over-fishing. Click here to read full abstract.