Our earth is enclosed by 75% of water that could be a river or sea or ocean. The underwater sensor network becomes more and more conventional for monitoring huge areas of the oceans where manual intervention is not possible. Underwater sensor Networks consist of an inconsistent number of sensors that are deployed to carry out monitoring tasks over a given area. The UWSNs offer continuous observation for various applications similar to ocean sampling networks, pollution monitoring, disaster prevention, submarine detection, etc. Simulation tools for underwater wireless sensor networks are gradually being used more to study sensor webs and to study new applications and protocols in this developing research field. This paper gives a simple analysis of simulation tools used for underwater sensor networks with a view to help researchers.