Tonga's national dish, Fiji's kokoda, and Samoa's oka are essentially the same recipe — Pacific cousins born from "cooking" fish in citrus instead of flame.
'Ota 'ika is raw, usually firm white fish marinated in citrus juice until opaque, then tossed with coconut milk, cucumber, tomato, onion, and chili. Widely regarded as Tonga's national dish, it turns up at markets, the wharf-side fish market, and casual eateries around Nuku'alofa.