This image depicts the interior of a marine aquarium, located in Geispolsheim, France, illuminated by blue (actinic) light

This image depicts the interior of a marine aquarium, located in Geispolsheim, France, illuminated by blue (actinic) light. The central subject is a clownfish (*Amphiprion* sp.), appearing predominantly black with electric blue-white and orange markings, positioned in the lower-middle of the frame and oriented toward the upper left. The aquarium environment is densely populated with various fluorescent marine invertebrates. A large cluster of branching coral, consistent with *Euphyllia* species, exhibits bright green and blue fluorescence on the left side of the frame. The bottom and right portions are covered by extensive formations of purple-blue fluorescent soft corals or anemones, characterized by numerous tentacle-like polyps, many displaying distinct green fluorescent centers or tips. In the upper right quadrant, a large, branching coral structure with a lighter purple fluorescence is visible. Other coral formations, including a brain-like coral with green fluorescent areas, are present in the mid-left background. Several small, blue fish, consistent with damselfish or chromis, are visible in the background; one is clearly distinct near the large branching coral in the upper right, with others appearing as faint silhouettes. The water is dark, and reflections or structural elements of the tank are partially visible at the very top edge. No human subjects are present.