Coelastrum

Algae

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Coelastrum

Coelastrum Naegeli: Scenedesmaceae. 

Green algae. These algae occur in free-floating colonies that consist of a hollow ball of close-packed round cells, with from 8 - 128 cells per colony (always an even number). Under magnification it can be seen that the cells are joined together by short connections. The colony lacks any mucilage coating and does not have the ability to move on its own or propel itself. At lake edges, or floating in nutrient-rich lakes. Not usually found in high numbers but rather mixed in with other types of algae.