Aquaculture is one of the areas that is rapidly growing in the world in the last years. The demand for food is increasing in recent years and aquaculture can significantly contribute to secure food in the future. The usage of IoT technology in aquaculture can improve the production process and quality of the water. The IoT technology and cloud computing increase the productivity and reduce the costs for fish farming. The systems that use these technologies in aquaculture are monitoring systems, systems for controlling water quality and intelligent fish feeding systems. The development of these systems will lead to more efficient aquaculture. The identification of hardware, protocols, platforms, and benefits of smart fish farming is necessary for the fish farmers and the researchers. The idea of this research is to present a systematic literature review of the IoT -based solutions in aquaculture. This work aims to identify the sensors, hardware, network protocols, software applications and benefits of using IoT in aquaculture. This paper is a systematic literature review about the IoT-based applications in aquaculture, IoT -based hardware used for fish farming, network protocols and cloud-based platforms used in IoT solutions, as well as the benefits of using these technologies.