On Thu, 12 Jul 2007 03:33:06 GMT, "Bob Weinberger"
wrote:

Although , for reasons no one has been able to determine, Didymo has
recently started acting like an invasive species and forming large "blooms",
it is native to North America (and Northern Europe). So it is, likely
already endemic in most streams in New England,

Interesting *and* scarey. Here's a movie of what it looks like. You
can't help but imagine what it would do to your favorite stream.

http://www.fedflyfishers.org/didymovideo.php

Dave