The Siamese catfish (Pangasius hypophthalmus) is a strategic freshwater commodity in Indonesian aquaculture; however, its growth performance in the field is often hampered by low feed conversion efficiency and water quality issues in intensive farming systems. This article presents a literature review on the potential of the commercial probiotic Raja Lele a product based on a consortium of Lactobacillus sp., Acetobacter sp., and yeast that has long been widely used in catfish (Clarias sp.) farming for application in Siamese catfish grow-out. This review found that supplementation with probiotics comprising lactic acid bacteria and fermentative bacteria consistently improved specific growth rates, feed conversion efficiency, survival rates, and water quality in Siamese catfish rearing systems. Direct evidence from Siamese catfish was combined with cross-evidence from the application of the Raja Lele probiotic in Sangkuriang catfish, which showed comparable patterns of growth enhancement and immune response. This study concludes that the Raja Lele probiotic has the potential to be adapted as a functional feed supplement in Siamese catfish aquaculture, with the caveat that the dosage and frequency of application still need to be specifically tested for this species.
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