The image captures an interior view of a freshwater aquarium exhibit, situated in Mora, Portugal

The image captures an interior view of a freshwater aquarium exhibit, situated in Mora, Portugal. A large, grey sturgeon with distinct barbels is prominently featured in the upper right, swimming horizontally towards the left. Below the sturgeon, a rounded, greyish fish, likely a carp, is visible, alongside another elongated grey fish positioned slightly behind and beneath the sturgeon. In the background, on the left side of the tank, several additional medium-sized fish are seen swimming near a transparent panel. The tank floor consists of light green to yellowish-green gravel. A dark, algae-covered rock formation extends along the right side of the tank, while a smaller cluster of dark rocks rests on the gravel bed towards the left. The water is clear. The surface of the water, spanning the top of the image, reflects an overhead structure with white elements and natural light. The bottom edge of the aquarium's viewing panel is visible in the foreground. No human subjects are present in the scene.