So... is Seto no Hanayome finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: January 05, 2009
Manga finished: November 22, 2010
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Seto no Hanayome
My Bride is a Mermaid
Anime - Base
Release date: April 02, 2007
Seto no Hanayome OVA
My Bride is a Mermaid OVA
Anime - Sequel
Release date: November 03, 2008
Synopsis
Nagasumi, a regular middle school student, finds his life turned upside down when he's saved from drowning by Sun, a mermaid.
However, mermaid law dictates that if a human discovers a mermaid's true identity, one of them must die.
To avoid this grim fate, Nagasumi is forced into an engagement with Sun, who happens to be the daughter of a powerful yakuza boss.
The anime follows Nagasumi and Sun as they navigate the chaos of their forced marriage, try to keep their secret safe, and deal with the constant threats to Nagasumi's life, all while trying to build a genuine relationship.
Expect over-the-top comedy and wacky characters as they struggle to balance the human world with the mermaid mafia.