Jellyfish was an American rock band that formed in San Francisco in 1989. Led by songwriters Andy Sturmer and Roger Manning, the group was known for their blend of 1960s classic rock and XTC-style power pop. They released two albums, Bellybutton (1990) and Spilt Milk (1993), that proved influential to many subsequent acts in a similar vein.

Power pop is a subgenre of rock music and a form of pop rock based on the early music of bands such as the Who, the Beatles, the Beach Boys, and the Byrds. It typically incorporates melodic hooks, vocal harmonies, an energetic performance, and cheerful sounding music underpinned by a sense of yearning, longing, despair, or self-empowerment. The sound is primarily rooted in pop and rock traditions of the early-to-mid 1960s, although some artists have occasionally drawn from later styles such as punk, new wave, glam rock, pub rock, college rock, and neo-psychedelia.