You can use the following tools

1. NS-2

2. QualNet

3. Aqua-Sim

4. UWSim

Its depend what exactly you're looking to get outcome from your simulator.

This is a customized simulator for underwater sensor networks:

Article UWSim: A Simulator for Underwater Sensor Networks

MATLAB is suitable because of the intensive calculations in this type of networks

Hi

thanks all for your fruitful answers.

best regards

Thanks, lot Dr. MURAD,

it is very important paper

regards

Hello Miloud

we use Aquasim for NS2

here is a detailed step by step do install both NS 2 and Aquasim

NS2: https://www.techerina.com/2015/02/installing-ns-235-in-ubuntu-1404.html

Aquasim : http://mohittahiliani.blogspot.com/2014/07/underwater-wsn-simulations-in-ns-2.html

Regards;

Thank you very much Dr .Sofiane

the link is very useful and fruitful

regards

https://pdfs.semanticscholar.org/31b7/f0df5a203fb02ffd205787ed2c3e96c2ffdc.pdf

AquaSim , I suggest

Underwater Wireless Sensors Network based on Acoustic,EM or Optical channel???