According to the research by Yonghu Park, however, “guduri” refers to a type of sea snail in Jeju. Long time ago, when a storm blew, some sea snails were moved into a field near the sea in Hamo-ri, Daejeong-eup. Then, people began to call the field “Guduriwat”. Based on the evidence, Park believes that “guduri” refers to “sea snail.” 聼起來自然嗎?

Here's a few corrections to make it more natural. ^^

However, according to the research by Yonghu Park, “guduri” refers to a type of sea snail in Jeju. A long time ago during a storm, a few sea snails were moved into a field near the sea in Hamo-ri, Daejeong-eup. Then, people began to call the field “Guduriwat”. Based on the evidence, Park believes that “guduri” refers to “sea snail.”