Underwater Cave Treehouse in Anime Style

An anime-style illustration of a whimsical treehouse built around and inside a submerged tree within a glowing underwater cave. Use vivid cel-shading, crisp linework, and expressive character design typical of anime. Sunlight streams in from above, refracting through turquoise water to create dancing light beams and bubbles that rise around the scene. The cave walls are encrusted with colorful corals, anemones, and bioluminescent algae; stalactites hang overhead. The treehouse is a cozy wooden structure with glass windows, a small balcony wrapped in swaying kelp, a spiral wooden staircase carved into the trunk, and a warm lantern-lit interior visible through the windows. A rope ladder dangles into a shallow pool of clear water; fish of neon blues and pinks swim through the branches. Include sea creatures like gentle jellyfish or a curious clownfish to add charm. The overall mood is tranquil and magical, a fusion of fantasy and nautical adventure, with soft, saturated colors in blues, teals, and coral pinks, and subtle water caustics on surfaces for depth and atmosphere.