As I was making my fishy scene for the mini competition I got the idea of animating the fish too. I already have the fish moving forward as I shooted them out with a particle emitter and an instancer. That doesn't look very realistic swimming though. They're just floating forward. I want the fish to bend too but I don't know how to do this. I'm pretty sure there's a way to assing a bend deformer to each fish (instanced particle) and have an expression to control the bend curvature but I don't know how to accomplish this. Any ideas?

(i hope you understand my english)