Noah of the Blood Sea is a Manga/Manhwa/Manhua in (English/Raw) language, Adult series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

When a family of three book passage on a luxury liner they soon realize that the glamours cruise ship is nothing but a facade as a series of mysterious killings spread throughtout the ship. With the sea proving no escape, how will they survive?