How many bones are in a dolphin’s dorsal fin?

How many bones are in a dolphin's dorsal fin?
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We did not have any winners from last week’s show where we  asked which cetacean species lives the longest. The answer is the Bowhead whale, which is thought to live well over 200 years. Now, for this week’s quiz: how many individual bones are in a dolphin’s dorsal fin? Think you know the answer? Surf on over to thedolphnipod.com and click on Dolphin Quiz – leave your answer in the comments section. Winners will randomly be chosen from the correct answers, and will be announced on next week’s show.  

Dolphin Dorsal Fin
*image from Hawai'i Pacific University website