There is no difference between the two, referring to the same animal. Because the seed crow is also known as sea hare, son of crow, than tube fish, is a kind of marine mollusks, the craft treatment processing of the seed crow raw materials, can fully retain the original freshness of the seed crow, commonly used in Korean barbecue, seafood hot pot, etc., so there is no difference between the two sea hare and the seed crow, refers to the same kind of animal.