Story: Life in fresh water

Scum-forming alga (1st of 3)

Scum-forming alga

Euglena (inset) is a single-cell alga. Like other algae, it can grow excessively (algal bloom). This forms a green scum, such as on the edge of this pond. Large masses of Euglena are often found in sewage oxidation ponds and other highly fertile waterways such as farm drainage ditches.

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Photograph by Stephen Moore

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How to cite this page:

Roger Young, 'Life in fresh water - Plants and recyclers', Te Ara - the Encyclopedia of New Zealand, (accessed 6 October 2022)

Story by Roger Young, published 24 Sep 2007