WordNet (r) 3.0 (2006):

pufferfish
    n 1: delicacy that is highly dangerous because of a potent nerve
         poison in ovaries and liver [syn: blowfish, sea squab,
         puffer, pufferfish]
    2: 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 [syn: puffer, pufferfish, blowfish,
       globefish]