Super Giant Ninja’s Jared Walker posts the second part for his tutorial which shows how to create, rig, and animate goldfish in C4D. The second part looks at the details using TurbulenceFD to create the ink or smoke like trails that are seen in the example.

use Turbulence FD to add an ink/smoke trail

JawSet’s TurbulenceFD is a voxel based fluid dynamics system for Cinema 4D that allows you to create dynamic fluid simulations that can interact with objects and particles in your scene.

Watch part one of the tutorial in the post Rig and Animate a Fish in C4D.