AECD-3446 -128- the sample count would be low even though activity were present in the soft >. Presumably cat® does not occur sufficiently abundantly to become involveg appreciably in the food cycle of corals. SUMMARY Radioactivity expressed in d/m/g wet tissue of invertebrates at the "ne stations was as follows: Bikini Target Area, dredging, 1080; Bikini target ines. 104; Eniwetok shores - Eberiru (near Aomon-Biijiri), 1500; Runit, 750; Enger: 490; Eniwetok dredging - off Eberiru, 140; off Bogon, 110. Less active staticns,,” at both atolls ranged down to 0.6. Considering all stations the most active spay a included asteroid starfish, 5,100; hydroids, 2,100; oysters, 820; and sponges, 4% Plankton-feeding invertebrates averaged significantly more activity than nom—2 ton~-feeders.