Variations in water depth, vegetative growth, and type of substrate are compared with the population densities of several coral species living on a shoal in Spanish Harbor, Florida Keys. Qualitative comparisons are drawn from studies conducted elsewhere in the Florida reef tract. Porites
porites and Manicina areolata prefer unconsolidated substrata with profuse vegetation, which aid in supporting their free coralla. Siderastrea radians, S. siderea, P. astreoides, and Favia fragum require firm substrata for attachment: the latter two apparently favor
depths in excess of 1.5 feet. F. fragum lives more removed from sediment.
The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.