It lives just offshore in cold parts of the world. Its poisonous spikes are thicker and shorter than those of other regions' Qwilfish.
It absorbs toxins from the food it eats. The distinct purple spikes on its body are evidence of its potent poison.
Fishers detest this troublesome Pokémon because it sprays poison from its spines, getting it everywhere. A different form of Qwilfish lives in other regions.