This illustration is split horizontally into two distinct prehistoric environments. The top half depicts a vibrant underwater scene teeming with ancient marine reptiles. A long-necked plesiosaur swims gracefully near the surface, while a large mosasaur with sharp teeth dominates the foreground, prowling near a shark. Smaller prehistoric creatures, including fish, squid, and flying pterosaurs visible above the water line, complete the aquatic ecosystem. The water is rendered in brilliant shades of turquoise and deep blue, with light rays filtering down from the sunlit surface to create a sense of depth.
The bottom half transitions to a lush, sun-drenched jungle habitat. A large, spined theropod with a patterned, golden-orange hide stands prominently on the left, while a towering, long-necked sauropod occupies the right side of the composition. A vibrant frilled dinosaur perches on a tree branch above, observing its surroundings. Smaller dinosaurs wander through the ferns and tropical foliage in the distance. The color palette here is warmer and more saturated, dominated by earthy yellows, greens, and oranges that evoke a hazy, golden-hour atmosphere. The art style throughout is highly detailed, using bold brushstrokes to define the scaly textures and anatomical features of the creatures.