My Bride is a Mermaid (2007)

Anime series · Comedy, Animation, Sci-Fi & Fantasy · 1 season · TMDB 6.5/10

Nagasumi's in hot water after a beautiful, young mermaid named Sun saves him from drowning. The deep-sea sweetheart's dad is a merman yakuza prone to executing anyone who learns his family's scaly secret! Luckily, there's a catch - if Nagasumi agrees to marry Sun, he just might avoid sleeping with the fishes!

Cast: Takahiro Mizushima (満潮 永澄), Haruko Momoi (瀬戸 燦), Ayumi Tsunematsu (サーたん), Atsushi Imaruoka (永澄の父), Takehito Koyasu (シャーク藤代), Noriko Rikimaru (伊院千代).

Not on a subscription app in India right now.