Energetic tradeoffs are responsible for the shift of energy allocation between various physiological processes within an organism which define life history traits. By understanding energetic tradeoffs, we can make predictions about growth and maturation during different life history stages. In aquacultured species, such life history traits determine meat production and time to harvest, and are thus important for profitability of operations. The purple-hinged rock scallop is being developed for commercial production in Puget Sound. Two common products for scallop meat are adductor muscle and the whole animal served on the half shell. Understanding the relationship between maturity of the gonad and size of the adductor muscle would inform market choice between these options for the emerging industry. Previous research on scallop energy allocation suggests that scallops may allocate energy away from the adductor and into the gonad during maturation. To evaluate this energetic tradeoff in rock scallops, 1200 scallops were out-planted in Puget Sound, 400 at each of 3 sites: Neah Bay, Dabob Bay, and South Puget Sound. Shell height, shell width, and shell depth were measured at three time points: initial outplanting (10/28/16), a sampling midpoint (03/06/17), and final sampling (06/08/17 – 06/11/17). Final sampling also included whole weight, meat weight, adductor diameter, and samples of gonad tissue for histology. The gonad tissue samples were mounted on slides, and analyzed to determine sexual maturation levels. Using maturation ratios, I will investigate whether there is correlation between adductor size and maturation, and whether any detected correlation is consistent across outplanting sites. Such a correlation would provide evidence of an energetic tradeoff during maturation as an individual shifts energy stored in the adductor muscle into the gonad. This data will build on previous research and inform the emerging rock scallop aquaculture industry on market selection.