![](http://www.alamy.com/thumbs/6/942BEA2F-3984-4B95-B344-3F10B9107D4F/HMYYWE.jpg)
Cyanobacteria stains on river rocks exposed to wet season flooding.
Size: 5125px × 3411px
Photo credit: © Jason Edwards / Alamy / Afripics
License: Royalty Free
Model Released: No
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