One Cell in the Sea is the debut studio album by A Fine Frenzy, the stage name of American singer-songwriter Alison Sudol, released under Virgin Records on July 17, 2007.

Sudol made a demo tape consisting of songs on One Cell in the Sea, which eventually fell into the hands of the CEO of Virgin Records.

During a March 2008 interview with The Ledger, she stated the following of the title: It's the beginning of something, it's the loneliness that I felt when I was making this album, because a lot of the writing of it was done late at night when everyone else was out doing their own thing.

[2] The music video for "Rangers," directed by Caitlin Dahl, features Sudol playing the piano in a natural setting along with shots of her and a lover gathering stuffed animals while avoiding being seen by an older man that follows the couple.

In her review for Entertainment Weekly, Shirley Halperin wrote that Sudol conjured up a "musical wonderland" in creating the album, describing it as a "colorful world of bemusement and sentimentality".

[22] Halperin calls the songs presented "breathless", complimenting those where Sudol's voice takes center stage, such as "Almost Lover".

[22] Paste's David Mead described the album as pretty and mysterious enough to draw plenty of admirers, but that Sudol's work stands out among her peers with its "completely ingenuous correlations between love and nature in her lyrics".

Mikael Wood of The Phoenix compliments "You Picked Me", but claims the rest of the album "bogs down in a minor-key rut that's the opposite of a frenzy".

[24] USA Today's Elysa Gardner wrote that One Cell in the Sea had some compelling moments, citing "The Minnow and the Trout" as a track readers should download, but admitted that Sudol needs to develop her songcraft if she wants to be "more than another quirky 'it' girl".