Moonlight in a Cartoon Underwater Cave

A playful cartoon scene of an underwater cave illuminated by a smiling, anthropomorphic moon. The moon glows pale yellow and floats near the ceiling, casting soft beams of moonlight through crystal-clear water. Thick, bold black outlines define charming rocks, stalactites, and colorful coral formations along the cave walls. Bioluminescent blue and purple algae light up the surroundings, while bubbles rise lazily. Friendly fish with oversized eyes, a curious octopus waving a tentacle, and a glowing jellyfish drift through the scene. The water surface is visible in the distance, adding a dreamy glow and reflective sparkles on the sandy floor. The style is classic 2D cartoon with flat, saturated colors, simple shapes, and cheerful mood suitable for a children's illustration.