Feeding behavior is analyzed in two freshwater decapods, freshwater crab Barytelphusa cunicularis and prawn Macrobrachium kistnensis. Freshwater crab Barytelphusa cunicularis are omnivorous and carnivorous, while prawn Macrobrachium kistnensis is more herbivores then carnivorous. The appendages like cephalic and thoracic collectively play an important role in feeding behavior in both decapods crustaceans. Food particles are pickup by chelate legs and third maxilliped. Chelate and third maxillipeds are important appendage for catching, handling of big mass of food and also placed the food up to the mouth. In mouth these food particles are first tear or grinded into fine particle by mandible when held in a convenient position by second maxilliped. The second maxillipeds are very important appendage and play an indispensable role in passing food to the mandibles. Again the mandibles play good role for cut the food into pieces.
