A radioactive surgeonfish makes its own x-ray. The bright area is a meal of fresh algae. The rest of the body has absorbed and distributed enough plutonium to make the scales radioactive. The fish was alive and apparently healthy when captured.
A radioactive surgeonfish makes its own x-ray. The bright area is a meal of fresh algae. The rest of the body has absorbed and distributed enough plutonium to make the scales radioactive. The fish was alive and apparently healthy when captured.
Contamination of Bikini Lagoon by the Baker shot of Operation Crossroads, Bikini Atoll, July 25, 1946. A radioactive puffy surgeon fish takes its own x-ray (fish was placed on photographic film overnight). Brightest area is the stomach filled with fresh algae. The rest of the body has absorbed and distributed enough fission product radioactivity to make the entire fish radioactive. The fish was alive and apparently healthy when caught.
The task of radioactive decontamination following the Baker nuclear test at Bikini Atoll during Operation Crossroads in 1946 was far more difficult than the U.S. Navy had prepared for. Though the task’s futility became apparent and the danger to cleanup crews mounted, Colonel Stafford Warren, in charge of radiation safety, had difficulty persuading Vice Admiral William H. P. Blandy to abandon the cleanup and with it the surviving target ships. On August 10, Warren showed Blandy an autoradiograph made by a surgeonfish from the lagoon that was left on a photographic plate overnight. The film was exposed by alpha radiation produced from the fish’s scales, evidence that plutonium, mimicking calcium, had been distributed throughout the fish. Blandy promptly ordered that all further decontamination work be discontinued. Warren wrote home, « A self x ray of a fish … did the trick. »