{i} any species of fish which inflates its extended body with water until it is spherical (as a form of self-defense); sea urchin, blowfish, puffer
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
The globefishes can suck in water or air and distend the body to a more or less globular form