The deployment of sensor nodes in underwater environment is constrained by some resources of sensor node like: energy, processing speed, cost and memory and also affected by dynamic nature of water. The main purpose of node deployment is to get the sensed data from the underwater environment. One of the major tasks is to cover the whole area in underwater and also there must be a full connectivity in the network so that each sensor nodes are able to send their data to the other sensor node. Some researchers use the concept of node mobility for better coverage and connectivity. This work proposes an efficient node deployment technique for enhancing the coverage and connectivity in underwater sensor network. Simulation results show good performance in terms of area coverage and connectivity.