I got some time to make more fun fluids, This is just fast workflow: sharks animated with path deform and full houdini workflow (mainfluid, vdb mesh, foam, cloth, float, render).
-Mainfluid 50x50 45 mil particles.
-Main vdb mesh 50x50 5 mil poly.
-Foam 0-4 mil.
-Ocean BG mesh 120x120.
Shark model/rigged FREE download: http://carlosparmentier.com/files/whiteshark_v1.rar