This NOAA/CoastView map provides adequate seatruth,
as the tide height is reported to be at most ~40 cm in Florida Bay.
AVHRR reflectance animation in 1996 by USGS
What can cause this remarkable phenomenon?
Possibly variable salinity
L71015043_04320030112 12 JAN 2003
L71015043_04320020314 14 MAR 2002
L71015043_04320020415 15 APR 2002
L71015043_04320020125 25 JAN 2002