File:Dolphin embryo.jpg

Summary
An embryo of a Spotten Dolphin in the fifth week of development. The hind limbs are present as small bumps (hind limb buds) near the base of the tail. The pin is approximately 1 inch long. Images to accompany the article by Dr. J.G.M. Thewissen and co-authors on hind limb development in dolphins. Copyright 2006, Dr. J.G.M. Thewissen, used with permission, from Hind Legs and Dolphins