Sea urchin paste needs to be refrigerated. Sea urchin paste is a perishable food that is susceptible to bacterial contamination and growth, so it needs to be kept at a low temperature to prevent spoilage. Place the sea urchin sauce in the coldest part of the refrigerator, where the temperature should be between 0-5 degrees Celsius. Also, when using sea urchin paste, please make sure to observe hygienic conditions to avoid cross contamination and food poisoning. If the sea urchin paste has been opened, it is best to consume it within 3-4 days and not beyond the shelf life.