I took some time to model a simple fish and animate his body along a motion path in Maya. The results are really really worth it! I love how it looks.

I let them duck down into the deep abyss as well, making them temporarily disappear..

Oh, and A sun and skybox as well..

They move around the horizon, making the world look more alive! I painted them in Photoshop to make them look similar to the cloud particles that were in the original concept art. The all-white sun as well!

There was something wrong with my Unity project and the shaders I made, making basic light effects and fog not work.. But I fixed it now! The green fog adds a lot of the serene nature of the orignal piece of concept art..