The name is simply 'shutki' in Sylheti pronunciation: Sylheti regularly turns the Bengali 'sh' sound into an 'h', so shutki becomes hutki.
Dried fish is simmered or fried down with vegetables, chili, and garlic into a sharply pungent curry that pairs with plain rice. In Sylhet it goes by its local name, hutki, and shows up in home kitchens and small eateries throughout the division.