thirukaimeen kulambu - stingray fish curry

thirukai meen kulambu-stingray fiah curry
stingray fish - 1 kg
onion - 1
tomoto - 1
fish curry powder - 2 tbsp
red chili powder - 1 tbsp
green chili - 1
turmaric powder - 1/2 tsp
coconut milik - 1 cup
cumin powder - 1/2 tsp
fennel seeds powder - 1/2 tsp
peper powder - 1/2 tsp
fenu greek seeds - 1 tsp
garlic - 8 nos
tamarin lemon size
oil 2 tbsp
salt to taste