A Japanese Research Team recently breed Transparent frogs.....(technically they should be called translucent frogs.)

http://www.enn.com/top_stories/article/23408

This next link contains video.

http://www.msnbc.msn.com/id/21084239/

http://www.abc.net.au/news/stories/2...27/2045617.htm

Of course there are some frogs that are pretty much naturally translucent ......the Glass Frogs.