Copepods are alternative candidates to traditional live feeds used in marine hatcheries and food quality and type are recognized factors that influence copepods culture success. In this study, we evaluated the effects of feeding the calanoid Acartia grani with two microalgae - Rhodomonas marina and T-Isochrysis sp. - and one dinoflagellate (Oxyrrhis marina). Results showed that reproductive parameters were improved when R. marina was included in the diets, but the higher number of adults was found when O. marina was combined with R. marina. According to the life stage of the copepod different combinations of diets would be recommended.