Clean the fish.
Fry coconut with one pinch fennel seeds, 3 small onions and curry leaves till brown in 1 tsp of coconut oil.
Blend it with water.
:- Coconut should be grated well.
Dry roast all the three powders.
Mix this with onion, tomato, crushed garlic, coconut blended, tamarind paste and salt.
Add 1 1/2 cups of water.
Cook, till the onion and tomato is well done and the curry becomes little thick.
Add prawns and cook till done.
:- Do not cook too much. It will become hard.
Add green chillies.
Heat coconut oil in a pan.
Fry 3 chopped small onions and curry leaves. Pour into the curry.