Ok, 1st of all, you have a bright light from the exploratory vehicle, pointed down in the night. 2nd the water has a grey/light-blue hue on the surface.
All water shaders/assets (Aquas, R.A.M., etc.) have a “fog” value somewhere. Heres what i would try out. Replicate the lighting (spot light), and use the fog/surface options of the water you use, to create the water hue and look.
Last thing is the “fog/smoke” you mentioned. The fog is a “water surface fog”. You can do this with a volumetric fog. Optimize everything, and press play