This Brazilian artist has taken his ability to create intricately detailed scientific illustrations in a more fantastic direction as can be seen above. The first three images on this page have some very bizarre creatures with anatomies mixed with those of other more normal creatures. On this page you'll find images of a catfish headed penguin. And this page takes you to a gallery of many other strange creatures.
Seeing these creatures in this context seems to make them appear more real, as though someone had actually captured and studied them.
The "Cryptozoology" section has some great anatomical illustrations of strange looking individuals.
Artist found thanks to Hugo Strikes Back!