Depicts all 12 of the magical sea creatures in the Luminous Marine Life series in silhouette. Air bubbles up between them and a tail fin disappears beneath the waves to the right. Surrounded by the country name and the denomination.

Depicts a wide band reminiscent of an old-fashioned porthole, that frames an aquatic scene and features a mauve stinger in the center. An island with palm trees can be seen above the surface of the water. When the coin is illuminated with ultraviolet light, the jellyfish glows and changes colour, so that the light brown of its bell turns blue or red, as does the pinkish purple of its tentacles and oral arms.

The mauve stinger (Pelagia noctiluca) is a delicate jellyfish known for its bioluminescent abilities. This transparent species glides gracefully through the water and can be found worldwide in tropical and warm temperate seas. Its entire body can emit a glow, and when touched, its bell and tentacles produce light lasting several minutes, triggered by an enzyme activating a luminescent molecule. The jellyfish's mucous coating also glows and can transfer its glow to other objects it contacts.

Both its tentacles and bell are covered in stinging cells, making encounters painful but generally not dangerous. Large swarms of mauve stingers can affect local economies by deterring tourists and clogging fishers' nets, sometimes even wiping out entire fish farms.