important items in their diet. Of the more than 700 species of reef fishes at Bikini Atoll, we selected three species commonly eaten by the Marshallese and representative of three feeding habits: the mullet,* a plankton feeder; the convict surgeonfish, a grazing herbivore; goatfish, a bottom-feeding carnivore. and the The specific radionuclides found in fish and their concentrations are often associated with feeding habit, hence this was a necessary consideration in selecting samples representative of the kinds of fish which would be eaten when the Bikinians return. A fourth kind of reef fish, groupers, was also collected as respresentative of the higher order carnivores. mv The troll-caught fishes are all high-order carnivores and fall into two broad subcategories: resident lagoon fish, ulua and dogtooth tuna; and migratory fish, yellowfin tuna. caught in or near Enyu Pass. All were Bikinians who were part of the clean-up crew cut filets from the yellowfin tuna and preserved them by salting. They said tuna is one of their favorite fish and, presumably, would fish for tuna if they return to Bikini. The invertebrates sampled were the spiny lobsters coconut crab and "giant" clams hippopus). (Tridacna sp., (langouste), and Hippopus Some of the species of Tridacna never exceed a few centimeters in length, and only the smaller species were found * For a list of common names and scientific names, Appendix Table 16. see