This is a 3d model and animation of a Ayu.

https://www.youtube.com/watch?v=UdLK1_uGYrE 

https://www.youtube.com/watch?v=jBElkFjTZpo 

Blender(2.79) file of 3D model and animations of a Ayu.

I stuck with the structure and animation around the mouth and gill.

Two size models are included.

AyuBigSize assumes use with UE4.

See below for how to use AyuBigSize with UE4.

How to import to the game engine