Published Dec 10. 2006 - 17 years ago
Updated or edited Sep 22. 2015

Didymo (didymosphenia gem...

Didymo (didymosphenia geminata) is a freshwater algae that forms massive blooms on beds of streams or lake edges that have some wave action. Introduced from Nth America. Can choke out insect life.
Some rivers in South Island, New Zealand.

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