According to the inquiry of Gourmet World, fish chin is not fish fat. Fish fat oil is a part of fish, which is located on both sides of fish belly. It is one of the highest fat contents in fish, usually white and oily. Fish chin is the part of fish chin, which is usually used to make fish soup or stir-fry dishes.

Although fish fat and fish chin are both part of fish, their taste and texture are completely different. Fish fat oil is rich in fat and tastes smooth, while fish chin contains more collagen and tastes tough.