The low oxygen content in the rearing medium causes the larvae of jellyfish to become abnormal, growth is disturbed, and the survival rate is low. The study used a Complete Random Design (RAL) with 4 (four) treatments, namely A: 1 (one) aeration point, B: 2 (two) aeration points, C: 3 (three) aeration points, D: 4 (four) aeration points. Each treatment was carried out 3 times. The results showed that the difference in the number of aeration points given during the rearing of jellyfish larvae had a real effect on the abnormality and performance of the growth of larvae (Leptobarbus hoevenii Blkr). The best treatment for this study was treatment A with the number of aeration points used as much as 1 aeration point for the maintenance of jellyfish larvae (Leptobarbus hoevenii Blkr) in an aquarium with an Absolute Weight Growth (PBM) value of 0.492gr/head, Absolute Length Growth (PPM) 2.97cm/head, abnormality rate of 0.83%, Survival Rate
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