Aqua Knight (水中騎士, Akua Naito) is a manga by Yukito Kishiro. It's a fantasy tale about Ruliya, a female orca-riding knight, making an epic journey through the aqueous world of Marmundo.After publishing three volumes, Kishiro placed the series on hiatus to draw Battle Angel Alita: Last Order. He has promised to continue Aqua Knight when that is finished.