Figure 1. Index map showing the National Oceanic and Atmospheric Administration survey H12299 study area (red polygon) in western Block Island Sound. Also shown are other surveys in Block Island Sound interpreted as part of this series (gray polygons) including H12296 (McMullen and others, 2014); H12023 (McMullen and others, 2013); and Block Island Sound survey, a combination of surveys H12009, H12010, H12011, H12015, H12033, H12137, and H12139 (Poppe and others, 2012).