The family Cyprinidae (minnows) was the type of fish studied for this poster presentation. For over 100 years, records have been taken of the size and shape of the fish. They have undergone significant changes over the course of the records, which date back to 1900. Changes in the shape of a species are generally due to habitat alteration, pollution, invasive species, and exploitation. For the Cyprinidae studied, females showed decreased caudal area (tail area of fish) and increased abdominal area compared to males. It is thought that this change is a byproduct of fecundity constraints and could indicate either more eggs or larger eggs in the abdomen