Parrotfish Scarus sordidus are common reef-dwelling, grazing omnivores feeding on live coral heads and occasional algae. Parrotfish are in the fourth trophic level. Four species of clams, Tridacna gigas, Tridacna squamosa, Tridacna crocea, and Hippopus hippopus were collected. These large invertebrates are sessile, filter-feeding mollusks that live on the lagoon bottom and coral reefs. Larger benthic, midwater, collected from the lagoons. the third trophic level and surface carnivores were also occasionally Grouper Epinephelus sp. are benthic carnivores of that feed on small fish and invertebrates.- Jacks Caranx melampygus and Elegatis bipinnulatus (rainbow runner) are fast-swimming carnivores that feed on small fish and occasionally eat swimming crustacea. and Lutjanus bohar (red snapper) level. nuda 2 Tuna and Euthynnus mackerel carnivores oe affinis small fish bipinnulatus may (grey snapper) are hovering midwater-to-surface carnivores. (pigfish) is a bottom dweller feeding Jacks and snappers are in the fourth trophic . (bonito), Grammatorcynus feeding on Elegatis Snappers Aprion virescens Another snapper Letherinus kallopterus primarily on benthonic crustacea. squid. Thunnus billineatus and any other albacares, are large, prey of and Gymnosarda rapid-swimming proper size. They represent species of the fifth trophic level. SAMPLE LOG All marine samples except water and all terrestrial vegetation and animal samples were samples were double double bagged bagged in plastic, and sent carefully labeled as to location and frozen, unfrozen and to returned LLNL. time of collection. to All LLNL. Soil samples were Detailed log books were completed at the end of each day of sampling so that precise records were available indicating the type of sample, location from which it was collected, date, and other pertinent information. SAMPLE PROCESSING PROCEDURES TERRESTRIAL SAMPLES Soil Samples Soil samples were the largest category of all the samples collected. soil-processing laboratories were carefully surveyed 9 for possible The radioactive