Noctiluca in the North Sea?

These swirling tendrils of phytoplankton might be Noctiluca scintillans—a type of marine dinoflagellate known to inhabit this area.

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NASA Earth Observatory image by Wanmei Liang, using Landsat data from the U.S. Geological Survey. Story by Adam Voiland.

Published June 16, 2023
Data acquired June 14, 2023

Source:

Landsat 9 > OLI-2