From wetpixel.com:
On August 25, 2007, Antonio Moreano, a naturalist in the Galapagos, photographed an albino whale shark at Darwin, the northern-most island of the Galapagos. Below are some images that Antonio sent us.
Antonio is a naturalist for the M/V Deep Blue, and for private yachts in the Galapagos. If you need to reach him, you can send him an e-mail at antonio@galayachts.com.
See this link from Divernet with the original article.
