What is this close-up picture? (WotsThat: Sea salt crystals)

Question

What object is shown in this zoomed-in close-up photo?

BiotiteStorm · Accepted Answer

Sea salt crystals. Sea salt crystals can actually glow in the dark if they contain bioluminescent bacteria from the ocean—creating an eerie blue shimmer that's sometimes visible in salt harvesting ponds, especially in places like the Mediterranean and Dead Sea. This phenomenon occurs because certain marine microorganisms produce light as a defense mechanism, and when concentrated in shallow salt beds, they create a natural light show that salt workers have documented for centuries.

Answer: Sea salt crystals

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