The relationship of the muscle volume to a linear measurement of the shell in the formula K=muscle volume/shell measurementN was used to compare the condition of bay scallops,Aequipecten irradians, from different environments in the Niantic River, Connecticut. The scallops were collected from the age of about 7 months through the 20th month, which is near the end of the life span. Areas judged to be similar except for prevailing current influences were selected as collecting stations, two stations being subject to strong tidal currents and two with little or no flow. One of the areas of strong tides had a scallop population approximately five times as dense as a nearby and otherwise comparable sampling location. The K2-scallop age relationship was determined by regression. This indicated an increase in K with scallop age. There were two deviations in K below the regression line: from June through mid-September and from mid-December through January, at the approximate ages of 11 to 14 months and 17 to 18 months respectively. K values rose well above the regression line during October and November when the scallops were approximately 15 to 16 months old. K values tended to be higher in the current-free areas, thus the prevailing concepts attributing favorable scallop condition to current effects must be qualified. Since K values were lowest at the densely populated station, the possibility of competition for food is suggested.