So here we are on Pensacola Beach in the Gulf of Mexico. However, on the other side of this tiny strip of land is the sound and mysteriously some of the sound is a bay and another part becomes a bayou. definitions please!
Bay: an indentation of a shoreline larger than a cove but smaller than a gulf
Gulf: an arm of a sea or ocean partly enclosed by land; larger than a bay
Sound: a large ocean inlet or deep bay
Bayou: a relatively minor, sluggish waterway or estuarial creek through lowlands or swamps, generally tidal or a slow imperceptible current flow
and for everything about Red Tides: http://isurus.mote.org/~mhenry/rtupdate.phtml