15 hand, the estimated mullet gill concentrations are higher than levels measured in the snapper. The largest difference in concentrations are associated with the viscera samples. However, if the estimated plutonium in the intestinal contents of the mullet are subtracted from the measured total viscera concentration, only 0.94 pCi/kg wet would be associated with the mullet viscera. This is roughly a factor of two higher than the concentration associated with the snapper viscera. The concentration of plutonium associated with the contents in the snapper stomach was small. Although the intestinal tract of the snapper is small relative to the stomach, the ingested material in the intestine tract does contribute some weight to the viscera sample. If we assume this weight to be half the Sample weight, as was the estimated weight for the contents in the mullet GI tract, the concentration of 239+240 Pu associated only with the snapper viscera would be equivalent to the concentration in the mullet viscera. Concentrations of 2394240, in the eviscerated samples of mullet and snapper are essentially identical whereas the average concentration in the whole mullet, on either a wet or dry weight basis, than the concentration in the entire snapper. is 4 to 5 times higher We would agree with previous studies that there is a difference in the concentration of plutonium as a function of trophic level and feeding habits only when concentrations in the entire fish are compared. However, eviscerated fish tissues are considered, if only concentrations in the the difference is insignificant. Apparently mullet ingest more plutonium associated with their food items than the snapper, but the amounts of 2394240 Pu concentrated in the muscle, skin or bone in fish from either the first or second trophic level