He's so precious!! Don't worry, I'm sure your care will have him unclamped in a day or two and his colors will start brightening up! I am betting his fins are going to turn bright orange and his body will probably be blueish-purple. ^_^ I would definitely call him a marble... and one lucky betta that you saved him!
This might sound silly, but despite his abuse, he looks so regal. What about the name Prince? Or how about Sheik?
Back after a hiatus.
Pongo - HMPK Koi Male
Onyx - DSH Cat