You mean like ear holes?
Or lobes. For dangly things.

I imagine the have some sort of hole like thing maybe inside their mouth or gills.
Sound is not much good for direction under water though.
Maybe just a pressure sensor organ? Doubles as a depth gauge?

-OMotS


"If memory serves fails me..."
Quote: ( unnamed) "been prtty deep in the cooler todaay "

Television and radio are most effective when people question little and think even less.