Wireless Sensor Networks have high stature in underwater observation, exploration and monitoring applications. Qualitative and effective research has been carried out in UWSNs from last few decades. Ambition behind this research systematic review study is to provide a comprehensive survey on latest research in underwater wireless sensor networks. Herein we provide a brief discussion on major research challenges and development in UWSNs. We provide a periodical review on UWSNs issues and potential challenges highlighted in previous studies. In this paper, we investigate research methods to gain attention of research fraternity towards future technologies and challenges of UWSNs on the basis of existing approaches. Thus it is our foremost requirement to provide state-of-art analysis of existing UWSNs.