How many episodes of my My Bride is a Mermaid are there?

"My Bride is a Mermaid" (also known as "Gintama" or "Gintama") is an anime series, not a separate show with that exact title.

There are 367 episodes of Gintama, including the original run, the "Gintama°" sequel, and the "Gintama: Silver Soul" series. There are also several movie adaptations and OVAs.