burrfish
/ˈbɜrˌfɪʃ/
noun
- A type of fish with a round body covered in spines, which can puff up when threatened.
- Unlike some pufferfish, the burrfish has fixed spines that stick out even when deflated.
- We saw a small burrfish hiding among the coral reefs.
- The burrfish inflated itself into a spiky ball when the diver approached.