One famous fish.
Look up anything related to radioactive fish off Japan, and you find this one 12,400 Bq fish, one of 37 caught by researchers 22 miles from the plant in the fall of 2013. The others had far lower readings, only two above the 100 Bq/kg limit Japan has set, and well below the 1,200 Bq/kg limit set by the U.S. FDA. For additional reference, 100 Bq/kg is the natural radioactivity of the normal human body.
If any hotter fish had been found since, it would be the example in all the stories.
Aren't there enough people making things nuts around here?