Freshwater alga. Light micrograph of a freshwater alga, the water net Hydrodictyon, showing a full grown net (thick threads) and a young net still growing (thin threads). This alga frequently blocks rivers with its green scum.
Freshwater alga. Light micrograph of a freshwater alga, the water net Hydrodictyon, showing a full grown net (thick threads) and a young net still growing (thin threads). This alga frequently blocks rivers with its green scum.
