The Collaborative International Dictionary
sea hedgehog
Globefish \Globe"fish`\, n. (Zo["o]l.) A plectognath fish of the genera Diodon, Tetrodon, and allied genera. The globefishes can suck in water or air and distend the body to a more or less globular form. Called also porcupine fish, and sea hedgehog. See Diodon.
Wiktionary
sea hedgehog
n. (context archaic English) sea urchin
Usage examples of "sea hedgehog".
These fishes, like the tortoise, the armadillo, the sea hedgehog, and the crustacea, are protected by a breastplate which is neither chalky nor stony, but real bone.