Any plectognath fish which inflates its body, as the species of Tetrodon and Diodon of the family Tetraodontidae; -- called also blower, puff-fish, swellfish, and globefish. They are highly poisonous due to the presence of glands containing a potent toxin, tetrodotoxin. Nevertheless they are eaten as a delicacy in Japan, being prepared by specially licensed chefs who remove the poison glands.