Barramundi is the buttery, moist, mild white flesh of the Asian sea bass (Lates calcarifer), a big silver fish of the Indo-Pacific that ranges between the sea and the river. Its large, soft flakes, clean flavour and forgiving fat make it one of the most popular eating fishes of Australia and Southeast Asia, and the species that now anchors a fast-growing, low-impact aquaculture sold worldwide as a sustainable white fish.