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 an Antarctic krill in the center. As on all the coins in the series, a shell and a starfish can be seen to the left and below. When the coin is illuminated with ultraviolet light, the doctorfish begins to glow green and slightly bluish.

Despite its small size, the Antarctic krill (Euphausia superba) plays a massive role in the planet’s ecosystem and is featured in the Luminous Marine Life coin series. Growing up to 6 centimeters in length and weighing just 2 grams, this tiny crustacean is a cornerstone of the Antarctic food web. It supports a myriad of marine animals, including whales, fish, seals, penguins, and seabirds. By feeding on diatoms and other plant plankton, krill transfer the primary production energy from phytoplankton to higher trophic levels, forming dense swarms that can reach densities of 10,000–30,000 individuals per cubic meter. Their well-being directly influences the health of other species in their ecosystem.

Antarctic krill are notable for their bioluminescence, emitting light through specialized organs in their bodies, which function similarly to a torch with a concave reflector and lens. This bioluminescence, along with their ability to thrive on microalgae found on the underside of drift ice in the spring, underlines their adaptability and ecological importance. As one of the most abundant animal species on Earth, with a biomass estimated at approximately 500 million metric tons, Antarctic krill are vital to the Southern Ocean's health and stability.