I have sketched this concept while attending a particularly boring meeting. 

Special thanks to Jeff Brodsky's" fantastic custom trunk/tentacle rig system and Julian Oberbeck who has made an autorigger script using that technique.

 

Used programs:

 

- Maya (modeling, rigging, skinning)
- Zbrush (sculpting, normal maps)
- Mudbox (texturing)
- UV Layout (UV maps)
- Cinema 4D (rendering, water effects)

 

Technical data:

 

- two sets of 4K maps
- low poly meshes with Normal maps from Zbrush.
- rendered with C4D physical renderer.
- hair created by using Fibers in Zbrush
- water effects created by using C4D Object cloner and Metaballs.