pufferfish
Concise Oxford English Dictionary © 2008 Oxford University Press:
pufferfish/ˈpʌfəfɪʃ/
▶noun (pl. same or pufferfishes) a stout-bodied fish which inflates itself like a balloon when threatened. [Tetraodon cutcutia and other species, family Tetraodontidae .]
'pufferfish' also found in these Oxford entries:

