A stone with blue tears

The rocks of the seaflies off the southwest coast of Honshu Island, Japan
Photographer Trevor Williams and Jonathan Galione
Once they found a wonderful beach in Okayama, Japan, where there is a kind of shrimp that emits a strange blue light, people call it "sea fireflies", they are extremely rare, they live in shallow sands, and they float everywhere with the tide rising and falling.
Sea fireflies are generally about 3 mm long, and the individual luminous brightness is very low, but the scene of many sea fireflies gathering together is extremely spectacular, like a "brilliant galaxy".