balloonfish
/bəˈlunfɪʃ/
noun
- A type of fish that can inflate its body into a round, balloon-like shape as a defense mechanism; also called a pufferfish or blowfish.
- Some species of balloonfish contain a toxic substance called tetrodotoxin.
- We saw a colorful balloonfish swimming near the coral reef.
- The balloonfish puffed up into a spiky ball when the diver approached.
Synonyms