Not that I can tell. The same for internal lights. I’ve floated right past big bad guys with them. Once I’m out of the sub the do tend to zero in on me, however. They probably smell the poop in my pants. :)
As for the prawn suit, it is a different beast. Really the only things to worry about are occasional damage, or jumping way too far down for the depth it’s currently rated for. You can take attacks on the prawn from darn near anything once or twice. Fortunately most of the baddies in the game have a hit and run technique, so you pop out, repair, get back in and get out of dodge before they circle back. You can also use a drill arm (best) or claw arm (worst) to convince them to move along. So in unknown or baddie infested areas I used a drill arm and grappling arm combo. The prawn suit in non-Leviathan areas is akin to being a demi-god. Sand sharks and stalkers really can’t do much to you while in it. Bonesharks can, but only slowly. It’s somewhat unfortunate that you find all the pieces to the prawn suit 2/3 into the game, and I’m talking about the grappling arm, drill arm and jump jet upgrade. Those along with the thermal reactor module make it damn near the best way to move around.