Por La Boca Vive El Pez is a love song wrapped in vivid metaphors and Spanish street-poetry. Fito compares himself to a lobo hambriento – a hungry wolf that is never satisfied – because every fiber of him wants to be with the person he loves. Just as a fish survives through its mouth, the singer survives by saying and singing what he feels; his words are his oxygen. He calls himself paper and his lover air, showing that only together do they make sense. The sea filling with sunken ships hints at past failures and heartbreaks, yet he keeps sailing because each new song is a lifeline thrown toward her.
The chorus reveals his mission: he writes the way he bleeds, pouring raw emotion onto the page so he can stay close to her even when they are apart. Everyday wonders like the dawn or shooting stars lose their shine compared to the sparkle of her cola-cola eyes. At its heart, the track is a joyful declaration that life is short, love is urgent, and music is the bridge that lets him shout those truths before the dance ends.