Skip to main content

Blog: defense mechanism

pufferfish

Why do pufferfish "puff up"?

Pufferfish will “puff up” as a defense mechanism if they are threatened. A shape that is more than double its original size, round and sometimes covered in spines is much more difficult to bite and isn’t very appetizing to a predator.

Subscribe to the Seattle Aquarium Blog

Get news and updates from the blog delivered to your inbox