14 values. The whole 1976 mullet sample contained 1.2 pCi/kg dry, while the range in "whole'’ fish concentrations from 1972 ranged from 9-540 pCi/kg. Exposure to man from plutonium, by continuous daily consumption of 600 gms wet, eviscerated reef fish having a averaze concentration of 0.05 pCi/kg, as determined from our results, leads to a dose rate to the bone that is 0.005% of the EPA recommended guideline of 3 mrad/yr (Ep 77). Dose rates would be even less if only fish muscle or muscle and skin were normally consumed. We have shown that Kwajalein lagoon contains levels of plutonium equivalent to global fallout concentrations and that the concentrations in mullet are predicable using relevant concentration factor data. The concentrations of plutonium recently measured in two species of reef fish with different feeding habits are order of magnitude lower than concentrations measured in 1972. We can cnly suggest that the earlier Teported results (Ne 73) at Kwajalein were anomalous and that the dose Yates to bone of man, from ingested plutonium via the marine food pathway at Kwajalein, are closer to 0.005% rather than 10-25% of the EPA recommended guidelines. The concentrations of plutonium in the tissues of mullet and snapper were not as different as we would have expected from results of previous Studies and models (Gu 77, Li 77, Bo 76). The estimated plutonium concentration in mullet muscle and the measured concentration in the Snapper are identical within experimental error as are the concentrations associated with the bone. The skin of the snapper has associated with it slightly higher concentrations of plutonium than mullet but, on the other a een tl ewoAn wet TN S Dw oo f a