Check out this snippet by Yannis Yannakopoulos for Codrops that offers 5 different styles of animation that mimics looking through water blur effect for your images. You might also be interested in heat distortion effect or water ripple effect snippets. This animation was created with pixi.js WebGL renderer and GSAP.
You can find the project on Github(Our Fork). Check out the Demo and Tutorial on Codrops.