The reservoir has a surface acreage of 160,500 and contains two rather dissimilar lakes; namely, Lake Moultrie and Lake Marion. A four-year continuous creel census indicated that three-fourths of the catch of crappies was made in Lake Marion. Four distinct growth rates were encountered in a growth study of each species in each lake. A food habit study of 149 full crappie stomachs showed insects to occur 77.1% of the time and fish 55.7% of the time. A world record black crappie (Pomoxis nigro-maculatus) was caught in Lake Moultrie on March 15, 1957.