I'm creating assets for a collaborative project, and one of the things the person I'm collaborating with wants to make is a fishing mechanic. Here is a fish I created for the game. I created a skeleton that can be used for the fish and rigged it to a pike, the only fish I have created so far. So far, I have created a swimming animation, but, depending on how this fishing mechanic turns out, I might need to animate more.

Here is the pike rendered in Unreal engine with a shader:

Rig and animated mesh in Maya:

Imported to Unreal with animation: