Tumon Bay in Guam had such beautiful, clear, turquoise waters. There were some flotation devices on the beach as shown in the pic, but there weren’t many guests using them. Mostly the few people going into the waters were just swimming about on their own. I liked how the devices were in blue and yellow, to match the sand and sky.
The above image is cropped; here’s a full view version, shown with a sample frame: