Anyway link it and then I can see what your talking about, because I can't see how the mercury gets into their bodies if they just pass the excess water out of their body? They only absorb the plankton AFAIK.
Oh don't nother your right, I looked it up it seems plankton absorb these compounds too, and thus so do whales. My bad.
Oops I meant to quote this bit but deleted most of it, this makes no sense whatsoever now nm.