There is a never ending discussion around the topic 'chumming or not chumming'. But we all agree on the issue that chumming should interfere as little as possible with the natural behavior of fish. The simple device I called PCD might be of help to bring fish closer to your camera, without disturbing the environment too much. I used it in the Mediterranean to attract groupers, but I think it might also work with larger predators like sharks. It could be especially useful for the individual diver in conditions when chumming on a larger scale, e.g. on a diving boat, is not allowed or undesirable.
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