What is charapona? In Bengali this is nothing but a babyRohu or Katla fish. The marinated fishare fried and then simmered in a thick gravy made with mustard paste andsometimes added with poppy seeds finished in a warm, spicy, mustard flavoredsauce and this is How to Make Charaponar jhal/Sorshe bata diye Charaponarjhal/an excellent Bengali style fish curry with Mustard paste/Baby Rohu fishwith mustard paste.