Oka I'a or Oka is defined in several ways: it is a lime-marinated tuna, raw fish in coconut cream, or seafood salad. However, it is defined, it is a very tasty and simple dish to make , but a sure winner.

It is a marinated salad, kind of like a French ceviche or Philippines' Kinilaw na Isda. The idea is that the seafood is cured using the acid in citrus juice (lime), then combine it with other ingredients, including the coconut cream.
Oka is a marinated salad, kind of like a French ceviche. The idea is that you cure the seafood using the acid in citrus juice, then combine it with other ingredients and a dressing.

Most cultures eat raw fish: smoked salmon, sushi, Bismark herring, rollmops etc. Oka is the way Samoans prepare and serve raw fish. It consists of small bits of fish that have been left to marinate in a mixture of lemon juice, coconut cream, salt and onions.