Another color varient in a Cenote only a few hundred yards from Azul, it may be that the predominant white rock slabs cause the colors to wash out.
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I found the population that lives in pure sea water off Isla de Mujeres is much more red/orange.
Below a shot from a feral Florida population near Everglades city.

027 zps4b102ffd
I found the population that lives in pure sea water off Isla de Mujeres is much more red/orange.
Below a shot from a feral Florida population near Everglades city.


