This is a paid asset, but now you can download Heroic Swimming for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Heroic Swimming v1.01
This package contains a comprehensive set of professionally animated actions for acrobatic diving and swimming.
Please read asset description carefully to make sure it fits the needs of your project. Once purchased, the asset is non-refundable
Includes state machine templates to help you create your own controller
Blended transitions for fluidly pivoting underwater, and transitioning above and below the water surface
Includes root motion and InPlace animation
This asset includes swimming and diving animation only. On ground locomotion is sold separately in Heroic Traversal
Does NOT include environment geometry, water VFX, sound, player code or AI