they not only are hearing sounds; they are making them at an extremely high rate, and this is not just for communicating but more importantly, as noted previously, for seeing. Orcas have very good vision with their eyes, located on each side of the head. They are able to see with about the same acuity and for the same distances as humans. However, for any seagoing creature, there is an inherent limit to how far the water itself will allow it
