From Wikipedia:

Kero Kero Bonito (KKB) are a British indie pop band from London. The band consists of vocalist Sarah Midori Perry (known by her stage name Sarah Bonito) and producers and multi-instrumentalists Gus Lobban & Jamie Bulled. Their name's meaning is intentionally ambiguous, with one derivation from the Japanese onomatopoeic words for frog croaks and a type of fish. [4] Other meanings include the Brazilian quero-quero bird while “bonito” means “beautiful” in both Portuguese and Spanish, thus "Beautiful Quero-quero" – or even "I want, I want beautiful" in a rough translation.[5]