Mother of Pearl. Catalog Number: 1902TP12 Color: White Format: LP UPC: 5016958106577 Today Bjork and Rosalia have joined forces to release powerful new single 'Oral'. Produced by the artists alongside Sega Bodega, 'Oral' marks the first collaboration between Bjork and Rosalia. It aims to shed light on the alarming cruelty, and severe environmental and ecological consequences of open-pen ocean salmon farming in Bjork's native country, Iceland.