The image displays a cross-section of a contained aquatic environment in Kedung Dowo, Indonesia

The image displays a cross-section of a contained aquatic environment in Kedung Dowo, Indonesia. The upper portion of the frame features a textured, light blue painted surface, exhibiting signs of wear, chipping, and a lighter, irregular mineral deposit or efflorescence along its lower edge. This blue surface transitions abruptly into a body of dark, opaque green water. Along the water's surface, a dense aggregation of numerous small, dark-bodied tadpoles is observed clinging to the submerged portion of the blue wall. These tadpoles are concentrated in a continuous band along the waterline. Below this cluster, within the murky green water, at least two distinct, lighter-colored, oval-shaped aquatic organisms, possibly small fish or larger tadpoles, are faintly visible swimming. The water's dark green hue suggests a significant presence of algae or suspended particulate matter.