Qwilfish (Japanese: ハリーセン Harysen) is a dual-type Water/Poison Pokémon. It is not known to evolve into or from any other Pokémon.
Qwilfish is a small, round fish Pokémon covered in many sharp spikes. These spikes are derived from its scales. It has a paddle-shaped tail which is about half of its body length, colored with a bluish line around the perimeter and two markings in the center of the pattern. The top of its body is a bluish color, while its underbelly is a pale cream color. Qwilfish has large pink lips.