noun
porcupinefish; balloonfish
Refers specifically to Diodon holacanthus, a spiny pufferfish that inflates when threatened. In everyday Japanese, ハリセンボン is the standard name.
水族館でハリセンボンが膨らむところを見た。
I saw a porcupinefish puff up at the aquarium.
ハリセンボンは毒がある
Porcupinefish are poisonous and cannot be eaten.