"Mermaid" is a song by American pop rock band Train from their sixth studio album, California 37. It was released as a single on December 27, 2012. The song was written by Pat Monahan, Espen Lind, Amund Bjørklund, Tor Erik Hermansen, Mikkel Eriksen and produced by Espionage, Butch Walker.

Billboard.com describes that, "Train channels its inner Enrique Iglesias on this full-bodied track that takes to the sea -- 'to an island so remote only Johnny Depp has ever been to it before' -- where Monahan finds his true love, Ecco sandals and all. You can almost see the open, billowing shirt, shaved chest and wind-blown hair as he delivers the song's B-I-G chorus."

The song is written in the key of C minor. It has the sequence of A♭–B♭–Cm-Gm as its chord progression. The song is described to have an "island flavor", such as of reggae and calypso music, with its use of acoustic rhythmic guitars. It also has a Latin influence with its use of latin percussion.

The video was filmed in Hawaii. It has the front man, Pat Monahan, being welcomed in Hawaii. He walks off to a gorgeous looking beach where he sees a little boy (Aidan James) playing the ukulele and spots a beautiful mermaid (Jessica Uberuaga) on the shore. He starts to pursue her at the exotic looking beach and during the NFL Pro Bowl where the band performs around colorful Hawaiian dancers and cheerleaders.

...
Wikipedia