Food industry has today become more oriented towards customer and requires quick response system. Electronic systems help in minimizing the unsafe production and distribution of food products. Currently the food labelling systems do not guarantee the good quality and safeness of the food. Hence, traceability is a tool applied to assist for assuring of food safety and its quality. We have used Active RFID system for the traceability, the communication protocol of Active RFID has been carefully designed. Energy efficient protocol has been developed and its aggregated throughput, delay and evaluation of the number of collisions happening in the radio channels is done and compared to the existing protocols, commercially available for Active RFID. In case of Marine food monitoring the TMA (trimethylamine) gas is liberated when the marine food starts to decay, using this liberated TMA gas as one of the parameters we determine freshness of food. In this paper it is also discussed about the designing and developing of the TMA (trimethylamine) sensor which can operate at normal room temperature.