anime episode with mermaid

Can you name any magical girl anime episode where the protagonist(s) turns into mermaid?

I haven't seen it, but 'My Bride is a Mermaid'?

No. But I had watched Pichi Pichi Pitch. It's about mermaids too. I mean those girls turns into mermaids.

There's an episode in Tokyo Mew Mew where one of the girls briefly turns into a mermaid.

Mermaid melody (pitch pitch pitch and the 2nd season Pure)
http://static.zerochan.net/Mermaid.M...ull.903198.jpg

Mermaid Saga
My Wife is a Mermaid
tenchi GXP
And so many more...

Yeah, what most of the other people already said. Mermaid Melody Pichi Pichi Pitch, and Tokyo Mew Mew.