Ah yes, summer. Swimming, and cheerful lawn-care with a smile.
I have written about the underwater mermaids before, as a fun collection of photos I found in an antique store (the post is here, and the Flickr set here). I have been trying to find out if they were part of a larger collection and wow, are they ever! You can see a good gallery at the Smithsonian Magazine. The photographer is Bruce Mozert, who was also an underwater cinematographer:
Image Credit: Bruce Mozert, photographer. Found here.