Kirdeen are a rare sight for most people, as these Pokémon lurk and nest deep within the ocean. They use psychic powers to propel themselves and protect their fins; the symbol on a Kirdeen's chest dimly glows as it uses psychic powers.
In the springtime, schools of Kirdeen can be seen swimming up falls and rivers. A Kirdeen has the psychic power to create a rip in the dimensions and see into the future.