Frillish is a hadopelagic Pokémon which lives in dens about 5 miles (8 kilometers) under the sea surface. Because of this, it can cope with extremely dark and highly pressurized sea conditions. It is carnivorous; it gently floats around in waves until it can strike its prey. It makes its victim numb with the use of its poison spikes and takes it to its deep den. Its arms are filled with tens of thousands of poisonous stingers. There is a legend where Frillish are said to have been created from transformed residents of a sunken ancient city.