In the depths of the ocean, where the sun’s rays do not reach, there is, as one might expect, absolute darkness. However, if we could plunge into these abysses, our eyes would see a fascinating view reminiscent of the night sky full of twinkling stars. This surprising phenomenon is bioluminescence, the ability of many marine organisms to produce and emit their own light. They create beautiful and unusual lightscapes that are a source of constant amazement for researchers and nature lovers.