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20 July
The NASA captured the turquoise phenomenon in the Black Sea, caused by a massive coccolithophore bloom.
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Recent observations from NASA have revealed that the Black Sea has transformed into a turquoise hue due to significant blooms of coccolithophores, a type of microscopic algae. This phenomenon, which occurs annually during the spring and summer, has been documented by the OCI instrument on NASA's PACE satellite, capturing images of the unusual coloration on June 22, 2026.
Typically known for its dark waters, the Black Sea, located between Europe and Asia, experiences these seasonal changes as nutrient levels in the water increase. The satellite images showcase vast areas of the sea shifting to this striking turquoise shade, a visual transformation that is apparent even from space. This annual algae bloom not only alters the sea's appearance but also plays a role in the local marine ecosystem.
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