They liked to splash about in the water.
Taken with a Canon FD 70-210 f/4 zoom – the same type of lens I used many, many years ago. Then, it was on a 2x converter and a Canon AV-1. Now, it’s on a Vivitar 2x Macro converter, attached to my Sony NEX-6. Manual focus isn’t easy for this kind of shot, but the NEX autofocus isn’t great either. Either way, you’re relying on a bit of luck, but sometimes it will pay off.