Porcupine fish Meaning, Definition & Usage

  1. noun spines become erect when the body is inflated; worldwide in warm waters
    Diodon hystrix; porcupinefish.

WordNet

Definitions
  1. (Zoöl.), any plectognath fish having the body covered with spines which become erect when the body is inflated. See Diodon, and Globefish.

Webster 1913