[quimby]

Your reply is incomplete and incorrect. Although Cs137 does decay thru beta, it emits gamma rays. A standard gamma detector will detect Cs 137.

From wikipededia:

Caesium-137 has a small number of practical uses. In small amounts, it is used to calibrate radiation-detection equipment. It is used as a gamma emitter for oilfield wireline density measurements. It is also sometimes used in cancer treatment, and it is also used industrially in gauges for measuring liquid flows and the thickness of materials.

Again, a standard gamma detector will detect Cs 137.

This article does not specify the amounts of contamination, and is therefore good for little besides fear mongering.

[from occupied ga]

Your reply is incomplete and incorrect.

Nope - Incomplete, maybe, but not incorrect. Your response is incorrect and misleading.

[aruanan]

This article does not specify the amounts of contamination, and is therefore good for little besides fear mongering.

Further reports say that the amount of cesium is about 1/30 of the level of radioactivity of all the rest of the naturally-occurring radioactive elements in the tuna and is far below any levels considered dangerous to health.