I'm obsessed with both Dune and H.P. Lovecraft's work. The fact that this could go either way is brilliant. My imagination is running wild!
I like the colours you chose. They make him seem cold, lifeless and uncaring. It's scary to think of someone with so much power in their hands like that because who knows what they are capable of doing without remorse?
Heheh, I expect that it misses them too, given that they'd have surely shriveled up and fell off a good while ago. Turning into a fish, whether by magical or chemical means, would have its disadvantages.