Dolphin fishing is an annual practice in the town of Taiji, Japan.  This year some Japanese fishermen had an interesting catch -- a bottlenose dolphin with an extra set of fins. 

"I believe the fins may be remains from a time when dolphins' ancient ancestors lived on land," Osumi told reporters.

Scott Baker, associate director of the marine mammal program at Oregon State University in Corvallis, agreed, saying that "this certainly is direct evidence of evolution."

The dolphin was captured alive and is being studied at the Taiji Wahling Museum.