Technical Abstract: A synoptic profile was completed in July-August 2000 to assess the occurrence of off-flavor compounds (beta-cyclocitral, 2-methylisoborneol-MIB, and geosmin) and the cyanobacterial toxin in catfish production ponds. A total of 485 ponds were sampled during a one-week period; sample collections were weighted to reflect state acreage in production. Over 47% of ponds had detectable toxin concentrations; however, less than 10% of ponds exceeded 1 ng/mL microcystin. MIB and/or geosmin off-flavors occurred in 25% of the samples. Beta-cyclocitral was detected in over 98% of ponds, and was strongly correlated with presence of myxoxanthin (r = 0.94) and zeaxanthin (r = 0.82), both indicative of cyanobacterial production of this compound. Off-flavor compounds (geosmin and 2-methylisoborneol) were correlated to a lesser degree with zeaxanthin production (r = 0.78), whereas aphanizyphyl was better correlated to MIB and geosmin (r = 0.89 and 0.56, respectively) again suggesting cyanobacterial production of these compounds.