Released on Radiohead's 2007 album In Rainbows, 'Weird Fishes/Arpeggi' stands as a defining track of the band's experimental evolution. The song features a haunting, minimalist composition built on repetitive arpeggios and a distinctive synthesizer melody that creates an unsettling yet mesmerizing atmosphere. Thematically, it explores feelings of isolation and existential dread, reflecting the group's shift toward more abstract and electronic textures during this era. The track is widely regarded as a masterpiece of modern alternative rock, showcasing Thom Yorke's vocal delivery and the band's ability to blend organic instrumentation with digital soundscapes. Its enduring popularity highlights its status as a pivotal moment in the band's discography.