• WordNet 3.6
    • n globefish any of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globe; several species contain a potent nerve poison; closely related to spiny puffers
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Webster's Revised Unabridged Dictionary
    • n Globefish (Zoöl) 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.
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Century Dictionary and Cyclopedia
    • n globefish A gymnodont plectognath fish of either of the families Tetrodontidæ and Diodontidæ. These fishes are so named from their capacity for inflating themselves by swallowing air, the whole body or much of it becoming blown up like a balloon. In some cases, as that of Diodon, the fish assumes an almost perfectly globular form. See Diodon. Also called swell-fish, swell-toad, egg-fish, bottle-fish, bellows-fish, blower, etc.
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In literature:

Here also is the curious globefish, with its balloon-like body and prickly hide.
"The Pearl of India" by Maturin M. Ballou