. A.B. spoke out against the "filler songs" that their father and manager Abraham Quintanilla, Jr. wanted on their recordings, and began playing a groove that gradually became a song. Suzette Quintanilla, the band's drummer, said "we were goofing off" and insisted that after A.B. began playing on his guitar, Selena started singing, coming up with lyrics "as ideas came to her". Pérez, who later eloped with Selena in 1992, wrote that the lyrics Selena came up with were unfamiliar to him despite the singer's habit of spontaneously writing ideas in a notebook and leaving it "wherever around the house". The song was originally used for soundchecks during the band's rehearsals and was then transformed into a short recording by Selena about a cheerful fish swimming freely in the ocean. Pérez said that what was then called "Little Bidi Bubbles" came easily "for everyone in the band." In a 2002 interview he said that he played a riff using a crybaby (which gave off a wah-wah sound) and that A.B. gave him a "look" that suggested he was impressed with the sound that he had improvised. The riff became the basis of the song before the writing process began.