Mike Neumann runs a very successful shark dive operation in the Fiji Islands. He is a man whose intellect and professional integrity are far above average.
Mike's blog on Erich Ritter is "interesting", to put it - well, diplomatically... :-)
While I have had no problems with Erich Ritter except for a strong disagreement on one specific issue - his self-serving public comments on the death of Marcus Groh -, I know that he has a rather questionable reputation in the shark world.