Plant-derived feed ingredients are being investigated as sustainable alternative protein sources in aquaculture to lessen reliance on fishmeal. However, these components frequently include antinutritional factors (ANFs) like phytates, tannins, saponins, protease inhibitors, and trypsin inhibitors, which can have a negative impact on fish health overall, growth performance, feed utilization, and nutrient digestibility. ANFs cause mineral shortages and compromised physiological activities in farmed animals by binding with vital nutrients and decreasing nutrient bioavailability. Thus, the development of plant-based aquafeeds that are economical, nutritious, and sustainable depends on the efficient control of ANFs. Numerous processing methods, such as fermentation, germination, soaking, and autoclaving, have been effectively used to lower the concentration of antinutritional chemicals and enhance the nutritional value of feed ingredients obtained from plants.