In addition to side swimming behavior, Davidson et al. (2011a) measured rapid swimming speeds in rainbow trout cultured in tanks with mean NO3-N concentrations of approximately 100 mg/L.Rainbow trout cultured under these conditions swam faster than the rotational velocity of the culture tank, while trout cultured within WRAS with a ten-fold greater flushing rate and NO3-N concentrations of 13 ± 0 mg/L generally held position with the rotational velocity of the culture tank (Davidson et al., 2011a)