Commercially high stocking density of culture practice, the feeding has the significant contribution for fast growth and high yields. The aqua feed is potentiated with many ingredients in highly balanced nutritious components for enhancing the digestive mechanisms in fish and shrimp body. Spirulina has been shown to enhance immune function, reproduction, increase growth and good health. The present investigation has been conducted to understand the effect of spirulina as a feed supplement on health and survival of Macrobrachium lamarrei lamarrei for a period of 90 days. Highest values for health and survival gain in the prawns were observed in prawns fed with 5% Spirulina feed which was recorded to be 94% in case of survival rate and good health. Hence coming to conclusion that using Spirulina in the prawns can improve its health and survival ability.