1.aye aye - Joshua Goutam made the only one I am aware of
2.angler fish -Lang has been mentioned already, so what about this one:

even this one by Yuri Shumakov has its own charm:

I like the character and the geometry.
3.tarantula - this one is cool:

or this one:

This last one is mine:

4.crested penguin - can't find any other, but it looks great:

5.cassowary:

6.kiwi - Bernie Peyton:

7. sabertooth tiger - me (fully closed, color-changed belly, eyes and fangs):
https://farm3.staticflickr.com/2740/447 ... z.jpg?zz=1
8.centipede - Kota Imai:

9.platypus:

10. tasmanian tiger - Akihiro Kosuge:

11. echidna - Steven Casey:

12. koala - David Liangue:

13. dart frog - well, there is Lang's, and then there is mine, probably the one mentioned earlier:

14. river dolphin - the only one I know of:

15. scorpion - Kota Imai:

Artur Biernacki:

Robert Lang:

Nguyen Hung Cuong:

16. hyacynth macaw - Hugo Akitaya:

17. blue clam - this probably comes the closest to what you're looking for:
https://www.flickr.com/photos/polyscene ... 7/sizes/m/
18. komodo dragon - Leong Cheng Chit:

19. windscorpion = camel spider - Derek McGann:

and this one takes the cake:

Here is my attempt, but it still needs some work:

20. leatherback turtle - LaFosse:

This one by Chris Heynen is just as good, only the ridges on the shell are less pronounced:

21. vampire bat (or just a cool bat) - Yoo tae yong:

Dan Robinson:

22. narwhal (Sorry Jared):

23. pangolin - Eric Joisel:
https://farm2.staticflickr.com/1156/941 ... 22b573.jpg
24. tasmanian devil:

25. wallaby - Joseph Wu:

kangaroo - Gen Hagiwara:

26. tanuki - Satoshi Kamiya:

27. sun bear - Bernie Peyton:

28. axolotl - Doba Takahiro:

29. nudibranch - sea angel - T. A. Richards:

Glaucus atlanticus - Viktoria Serova:

Same animal - Derek McGann:

Sea hare - Kosuge Akihiro:

30. nautilus - Charles Santee:

Manuel Sirgo:

31. pseudoscorpion - Derek McGann:

Me:

Also me:
I only mentioned my models here because I was mentioned by previous commenters 
