Two games to incorporate aspects from

One of the games is Navy Moves FX developed by FX Iteractive, one of the missions in the game is underwater where the player encounters some sea creatures and enemies. It is somewhat similar to the idea I had for the enemies and how the player would be able to defeat them, for example by using a gun like in the picture below.

The second game is Everblue 2, this game could give an idea for the visuals and the different objects in the environment.