This summer I spent some time in the Yucatan Peninsula, Mexico with a group of mermaids. We visited the various Cenotes - Sinkholes in the jungle that the Mayas used for sacrificial purposes.
The photos turned out amazing but it was extremely difficult to achieve them.
We drove around to the various Cenotes trying to get permission to swim in our tails and use photography equipment. Even if we got permission and paid an additional photography fee, sometimes we'd get kicked out mid-shoot by some other official who changed his mind but kept the money. There was a lot of corruption. Then, once arriving at a Cenote we trekked through the jungle with all of our equipment and our mermaid tails (mine weighs 39lbs/18kg) in the stifling heat and humidity.
At first the very cold waters felt nice, but after a few minutes the temperature difference was extreme. This photo doesn't show how cold the water is and one of our mermaids almost got Hypothermia. Nevertheless, the end results are amazing.
This one was taken at Cenote Dos Ojos - the sinkhole of the two eyes. It is a famous cave scuba diving location and the stalactite formations under water are haunting.
The photo was taken by the master of mermaid photography Chris Crumley (https://chriscrumley.com).
Cenote Dos Ojos: http://www.cenotedosojos.com/
Cenote description: https://en.wikipedia.org/wiki/Cenote