A two-stage, modified static pile method of composting fish mortalities was tested for the effects of pile height on both the process and product quality. Two sets of compost runs were conducted with the volume of fish mortalities composted in the second set double that of the first. This was accomplished by increasing the height of the compost pile without increasing the cross-sectional area. The results indicate that this height increase had no significant effect on the quality or the maturity of the fish compost after 4 months of active composting. Differences in the temperature profiles of the piles did occur; with the taller pile, it took longer for the temperature to rise to thermophilic levels as well as to cool to ambient temperatures. Aeration had little consistent or significant effect on the compost quality, the volatile fatty acid concentrations or on the temperature profiles of the different runs.