The right (y) coordinate is independent of the x coordinate and since the fish patterns are dependent on the right side,the left hand side of the coordinate list can be pretty much ignored.
It is probable that side of the river matters so I will investigate this matter further. Time of day is another variable which im not sure of as of yet.
One can follow a specific pattern that fish appear in and fill in the general gaps in coordinates as they are not always precise.
Carp > Carp/Oxy > Carp/Perch/Oxy > Perch/Oxy > Perch > Perch/Abdju > Perch/Abdju/Catfish > Abdju/Catfish > Catfish > Catfish/Tilapia > Tilapia/Chromis > Tilapia/Chromis/Phagrus > Chromis/Phagrus: