Mermen

The Mermen are a gillman-like race in Kamen Rider: Vampire King. Most of the race was killed off by the Fangire, with their only survivor, Dagon now in service to Kamen Rider Vampire King.

Mermen can manipulate water & have keen senses, making them excellent marksmen. It is unknown how the Mermen feed off the human souls like some of the other Demon Races because humans are included in the demon races.