I just looked at the aerial photos of the beach post-katrina, and noticed that in certain places the water is dark brown and others it's greener, even when the depth appears similar. In particular, my section of seacrest seems to be the brownest! (http://photosflorida.com/images/katrina/Katrina%209-2-05%20(74).jpg ) Anyone know why that is? There's no dune lake there, but there is a permanent outflow stream in that spot, even when the sand is high. Could that little stream be turning all that water brackish? Or is this more a case of current flow trapping less-clean water? just curious, really.