Bioluminescence of Krill Rising to the Surface at Nightfall (likely Euphausia sibogae) – Arabian Sea, Oman
At nightfall, krill rise from the depths to the surface, driven by the planet’s largest daily animal migration. There, tossed by the waves, they emit a cold, bluish light. Their bioluminescence, produced by tiny organs called photophores, creates brief flashes across the surface of the sea. This shimmering glow — both camouflage and communication — sometimes turns the night ocean into a living sea of stars, drifting and silent.