Fluorescent sea shines like blue galaxy falling into earth, a recent wonder people find from distance in sea areas near Shunhai Street, Lyushunkou District, Dalian City, Liaoning Province. With stones thrown at surface, the water splashes like cracking blue fire, adding a sense of romance and mystery to the dark night. Fluorescent sea is actually a rare bioluminescent phenomenon, in which chemical energy transfers to light energy through biological chemical reactions. Spring is the perfect time for noctiluca scientillans in surrounding sea areas, thus creating the fluorescent sea.