Remove the skin & bones from the fish and mince. In a bowl, put the minced fish, chopped shrimp, red chili powder, salt, green onions, ginger, mint, cilantro, 1/2 cup of bread crumbs, egg yolk and lemon juice and mix well. Make lemons sized balls out of the mixture and flatten them into thick patties. Coat them evenly with the remaining breadcrumbs. Mix flour, little salt & red chili powder, coriander powder and water in a bowl to make smooth batter. Dip the patties in this batter and deep fry in hot oil until golden brown. Serve hot.