It is one of the most mind boggling thing to me how many animal species can survive with such convoluted life cycles. Fish do find their way into weird places. I've heard that fish egg stick to waterfowl feet.
Not to mention that no fish would have any insight into at least whatever is within visible distance from the shore surface. An accurate version of such a map would highlight an interesting perspective of how humans also lack the ability to perceive, comprehend, or even accept things they either physically or psychologically cannot perceive or do not wish to perceive and accept it.
Cool map though!