Efforts in managing leafy materials and aquatic plants as fish feed are essential approaches in sustainable fish farming. The purpose of this article is to explore the potential utilization of leaves, aquatic plants, and the processing methods involved in turning them into supplementary fish feed. The writing methodology employed is a literature review, involving stages such as journal search, journal selection, journal analysis, and journal synthesis. Based on the review of several relevant journals, it is evident that various leaf species such as Taro (Colocasia esculenta L.), Gamal (Gliricidia sepium), Lamtoro (Leucaena leucocephala), Cassava (Manihot utilissima), Noni (Morinda citrifolia), Turi (Sesbania grandiflora L.), Kale (Ipomoea aquatica), Papaya (Carica Papaya), and aquatic plants like Lemna Minor, Water Hyacinth (Eichornia crassipes), Azolla microphylla can serve as references for supplementary feed with beneficial content for fish growth. The utilization of these plants is a judicious step as it can reduce commercial feed costs, provide stable feed availability throughout the year, and mitigate negative environmental impacts while enhancing water quality. Managing plants as fish feed is not only economically favorable but also a positive stride towards sustainable and environmentally friendly fish farming.