You're going to want to expand this gorgeous, high-resolution photo to full screen, and use it as your desktop wallpaper. This transparent critter is a brachiolaria, which is the second larval stage of many types of sea stars. The photo was taken by Alex Semenov in July 2013, in Russia's White Sea.
The predator-prey relationship between frogs and beetles seems like it would be pretty obvious doesn't it? Frog spots beetle, frog stealthily approaches beetle, frog eats beetle. Done, done and done.