close-up view inside of an aquarium

close-up view inside of an aquarium. The scene is partially obscured by dark elements, including what appears to be a dark-colored rock or artificial structure. In the center of the frame, a crayfish is visible. It's brown with some orange/yellowish markings. The crayfish moves slightly, adjusting its position near some white stones and a porous, light-colored rock formation. Behind the crayfish, there is some green aquatic plant life, possibly algae or moss, along with a small, brightly colored fish that flashes in the background briefly. The bottom of the aquarium has smooth, rounded rocks.