Heh, a while back I started running a blog for wild cetacean news, so I got a few pieces on color mutations in cetaceans. (that rhymes!)
Check out this all-black Dall's porpoise they found in the 50's/60's.
Text is in Japanese, but there are photos. Two
white Risso's dolphins were caught in the Taiji drive hunt last year. What are the odds? Both have dark spots, so they aren't albino. A white Risso's dolphin was also recently spotted in
Monterey Bay.
Pretty recently, a
white bottlenose dolphin found off the coast of Florida made the news.