2g (wet), which is higher than dark muscle by a factor of sbout 1.5 and than light muscle by a factor of about 2. A flying fish taken from the stomach of one of the skipjack had about the same level of activity in muscle tissue as did the skip jack. Reef fish taken from the eastern shore of Guam had about the. game levels of activity as did the skipjack taken approximately 350 miles to the southeast. A single flying fish taken approxi- mately 60 miles northwest of Eniwetok had about 40 times as much activity in the liver, as did the skipjack and Guam reef fish,and about 3 times as much activity in the muscle. The activity in fish tissues from Quam was greater than rateBi that found in fish from the same area in 1955 * by a factor of 1.3 for liver and 6.9 for miscle, an indication there had been some additional radioactive contamination since the time of Operation Troll. The levels are low even though they are several times those found in fish from Puget Sound in 19554 No radiochemical analyses were made because the activity levels were too low for accurate determinations. It is clear from previous analyses of fish from contaminated areas in the Pacific that it is not likely strontiunm-90 would contribute any of the activity, and at most two pergent of the total B- activity.>’* A diagram of the J spectrum of the flying fish liver ts shown in Pigure 11, page 40; the presence of cel tt py? yy ’ gr”? 95 Nb°~, co, 60°? and n°? 45 indicated. _