well my final render
I tried different compositions, and light setups, cycle material adjustments and light setups.
What i wanted is to have those “rolingstone” lips to be pretty red, while the scene looks darker green.
I do that using a smoke material to absorb light (so we get deep ocean effect).
Also made procedural stone shapes here, hm maybe i should do a youtube of explaining how to do that.
Here another render on the concept (though some materials on the fish and background where not that ok), the composition is nice (but as blender crashed, it was lost).