What's inside a pufferfish? And what are pufferfish spines? What are blowfish spines? Are they bones? Or something else? In this video, we find out the answer by looking at a pufferfish skeleton, and comparing it to other fish like a piranha, and a silver bream. This video answers the questions:

What are pufferfish spines?
What are blowfish spines?
What's inside a pufferfish?
What's inside a blowfish?
Are pufferfish spines bones?
Are blowfish spines bones?
How hard are pufferfish spines?

Specimen use made possible by the University of Michigan Museum of Zoology

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