Falling Fish ! Niagara Particle and shader

OMG! It's raining fish! This a VFw I realized during my internship at Atelier Daruma. I had to create a particle to simulate a rain of wiggly fish. I used Niagara for the fish emmiter and the droplet emmiter. With collision event, I can emit droplets only when a fish hit the ground. I had to create a custom module to align the fish properly with the ground.