Definition of porcupine fish
: any of several bony fishes (family Diodontidae) that have sharp spines covering the body and inflate themselves into a sphere when threatened; especially : a spotted chiefly tropical fish (Diodon hystrix) that is olive to brown above with white below
First Known Use of porcupine fish
Learn More about porcupine fish
Britannica.com: Encyclopedia article about "porcupine fish"
Seen and Heard
What made you want to look up porcupine fish? Please tell us where you read or heard it (including the quote, if possible).