I served this delicious curry at my 30th birthday. You can use any white fish fillets that keep their shape well. I used economic frozen fish. This recipe will yield a lot of sauce :), so serve over basmati rice. You'll find coconut vinegar in Asian stores. You will need to marinate the fish for at least 30 minutes. It is included in the cooking time. This curry freezes well, but you will have to use fresh fish then.