In a style that merges the whimsical charm of Sponge with the intricate detail of Pen and Ink Drawing, imagine a scene where a colorful, rainbow-patterned fish glides gracefully beneath the water's surface, its vibrant blue and red hues contrasting against the shadowy depths. This fish, a beacon of life, is surrounded by delicate seaweed that sways gently, adding a touch of natural beauty to the underwater world. Above, the water's surface shimmers, reflecting the ethereal glow of a sprawling castle perched precariously on the edge of a cliff. Its towering spires, rendered in monochromatic tones, pierce through the mist, merging with abstract shadows that hint at a gothic mystery. The castle appears to be crumbling, its architecture intricately detailed yet fading into darkness, creating a dramatic interplay of light and shadow. In the backdrop, distant mountains loom under a cloudy sky, enhancing the fantastical atmosphere. The scene captures the essence of underwater life while intertwining it with the eerie, fantastical energy of a gothic landscape. The vibrant fish, a symbol of beauty and life, contrasts sharply with the haunting presence of the castle, inviting viewers into a world where colors dance with shadows, and the ocean's depths hold secrets waiting to be discovered.