Ulva lactuca and Ulva clathrata are marine green algae belonging to genera Ulva. These algae have a lot of nutrient such as protein, carbohydrates, lipids, pigments and others. These nutrient can be used to improve the growth performance and health of Shrimps. Several studies have shown that U. lactuca and U. clathrata have antifungal, antibacterial, antiviral activities. One of popular shrimp among people of the world is Litopenaeus vannamei. So that, this review article aims to comparing the effect of U. lactuca and U. clathrata as ingredients in L. vannamei juvenile feeds. This review also summarizes a literature survey of the nutritional content and antimicrobial activity of U. lactuca and U. clathrata.