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Why Does San Diego’s Ocean Glow Blue?

Clip Season Nature Season 43 1:53 Premiered 20241106

As the sun sets in the West, other lights come awake.

Just off San Diego's shore, single-celled algae called dinoflagellates start to reproduce and if disturbed, a chemical reaction within the cell creates a tiny spark of light. When the conditions are right, the algae multiply and the coastal waters glow blue.

Just off San Diego’s shore, single-celled algae called dinoflagellates start to reproduce and if disturbed, a chemical reaction within the cell creates a tiny spark of light. When the conditions are right, the algae multiply and the coastal waters glow blue.