Cartoon Troll in the Sunken Atlantean City

Cartoon-style illustration of a friendly troll exploring the sunken Atlantean city. A chunky, green-skinned troll with a round nose, shaggy hair, and a cheerful expression floats among ancient coral arches and crystal domes. He wears a coral crown and a kelp scarf, and he carries a small treasure chest strapped to his back. The underwater scene is vibrant and lively, with bioluminescent runes, schools of colorful fish, jellyfish, seaweed, and bubbles. Shafts of light pierce the water, illuminating the Atlantean ruins with neon blues and greens, carved statues, and submerged gates. The art should use bold outlines, simple shapes, and bright flat colors to keep a playful, family-friendly cartoon style.