Supply manner of the oil and fat which used the seaweed, contains lauric acid as configuration fatty acid, and lauric acid or that ester which uses the particular oil and fat offer of supply manner. It cultured above the kind which is chosen from the group which consists of the seaweed of the crypt alga class which consists of the Chroomonas being attached seaweed, and the Rhodomonas being attached seaweed which are chosen from seaweed, and Chroomonas diplococca of the kurorarakunion alga class, Chroomonas mesostigmatica, Chroomonas nordstedtii and Chroomonas placoidea in the nutrient medium, to ester after converting the lauric acid in the oil and fat where content proportion of the lauric acid from the culture in the fatty acid composition 3 mass % extracted the oil and fat which is above, was picked by desire, it separates and it features that acquires lauric acid or that ester, production manner of lauric acid or that ester.
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