Once my friend made fish curry, which was sour and spicy but it gave me new taste. i liked it very much and took the recipe from her. the different taste was because of kudampuli, it is a Kerelan dish, from middle part of Kerala .each region has its own curry and different. This is very easy to make and no hard work is required. Kudampuli has a very different taste, it is sour like tamarind but has a different flavour and taste. this curry is cooked in thin coconut milk then again thick coconut milk is added to make a gravy type or curry. i have added spices according to my taste, you can alter. as every one has there own taste, some like spicy and some may not. Some may like sour and some may not. Use Kashmir chilli powder , as it gives you a very good colour. I have used both sea bass and koduva fish(in tamil), both gave the curry a good taste, you can use any fish you like king fish, karimeen (pearl fish). Fish is an integral part of kerela, so you can find many varities of curries with fish and other than kudumpali in kerelan houses, no body uses other sour ingredient like tamarind , but very rare used for some other recipes for fish kudumpali.
Marinade
Curry
Seasoning/Tadka