Yucatan Peninsula, Mexico near Playa del Carmen in the KuKulKan Cenote, one of the locations we enjoyed shooting in without having to fight against 1,000+ pesos (US$100+) fees per "professional" looking camera. Water temp a constant 72F, but warm air getting out of the water, so very comfortable days.

Model: Luma Jaguar (San Francisco, CA)
Event: Mermaid Portfolio Workshop - 2014 Session Three - Mexican Cenotes -- with The Mermaid Atlantis.