This 3 Euro Coin Series Dives into the Depths of the Oceans. To celebrate the United Nations Decade of Ocean Science for Sustainable Development, we are embarking on an undersea adventure that shows just how fascinating and colourful the underwater world can be. With a mintage of 65,000, the 12 innovative 3 euro coloured coins in the series, 4 of which will be issued each year over 3 years, will not only make your eyes light up, the coins actually do that themselves thanks to special lighting effects.

As improbable and magical as the sea creatures featured on the coins may seem, they really do exist. Even though some of them live in the perpetual darkness of the deep seas, where no ray of sunlight penetrates, they all have extraordinary luminous qualities. They flash, sparkle and glow and change colour when necessary.

The same applies to the coins themselves, which glow when exposed to ultraviolet light in a way that is both exciting and piques our sense of scientific curiosity. A dedicated ultraviolet torch will help you to experience the charming creatures of Luminous Marine Life in full.