In the winter of 1963, a string of floats was installed at a position about two miles off shore from Panama City, Florida. One of the platforms was used as a base for data acquisition. This location was visited at bi-weekly intervals to photograph in situ the accumulation of marine organisms on the pairs of floats suspended at three levels. This report includes the photographic history so obtained and a partially annotated checklist of those major macroscopic organisms found on the floats after ten months in situ. No attempt at complete analysis of the species comprising the community which accumulated on the floats was made. However, certain prominent molluscs and barnacles, which made up a large fraction of the total volume of organisms, were used as indicators of gross accumulation.