Fresh duckweed family: Lemnaceae. is a good food source for tilapia, as it contains about 35–45% CP with good AA and mineral profiles Mbagwu et al., 1990.. Skillicorn et al., 1993. reported that the production of Nile tilapia fed duckweed Lemna and Wolffia. as a single nutritional input in earthen ponds in Bangladesh reached 7.5 m.t. hay1 yeary1. Furthermore the authors suggested that with better pond management and stocking density, the production can exceed 10 m.t. hay1 yeary1. Duckweed is also a good FM alternative for tilapia. Mbagwu et al. 1990. found that when fingerling
Sarotherodon galilaeus were fed with a 33% CP diet containing duckweed as a partial protein source, they exhibited better growth and feed utilization than those fed a 40% CP standard diet. Similarly, Arrivillaga 1994. and Essa 1997. found that Wolffia and Lemna, respectively, replaced up to 50% of commercial feeds 35% CP. of Nile tilapia without adverse effects on fish growth and body composition.