In this study, juvenile Hippocampus comes were fed three diet plans—Artemia salina, Pseudodiaptomus sp., and a mix of both—from 0-30 days after birth to assess growth, survival, and food selection changes. Seahorses fed with Pseudodiaptomus sp. or the mixed diet showed significantly higher growth metrics than those fed with Artemia salina alone. Although survival rates did not significantly differ in early and later stages, a diet including Pseudodiaptomus sp. proved more beneficial for growth, highlighting its importance as prey for rearing juvenile seahorses.