This article is about a/an race of monsters in Kamen Rider Kiva.

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

Mermen can manipulate water and 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.