Tongue-eating bug found in fish

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Jim says: Tongue-eating bug found in fish. In Britain a bug has been discovered that eats the tongue of a fish down to a stub, then attaches itself to become a replacement!
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Reader comment: Johnny says: "This fish was mentioned on a wonderful This American Life episode (Real Media
only unfortunately) and the interviewee, Carl Zimmer has great book that also mentions it along with
lots of other creepy parasites."