Krupuk ikan is a traditional Indonesian snack made from fish and starch. It is a type of cracker that is typically deep-fried until crispy. The main ingredients often include ground fish, tapioca flour, and various seasonings, which give it a unique flavor and texture. These fish crackers are popular in many Indonesian households and are often served as a side dish or snack. Krupuk ikan can be enjoyed on its own or paired with rice and other dishes, making it a versatile addition to Indonesian cuisine.