A stunning, vibrant 3D render of a small mermaid named Pequena Sereia. She has flowing blonde hair, a beautiful, intricately designed tail with a mix of iridescent blues and greens, and a playful expression. The surrounding underwater environment is filled with bright coral, lush seaweed, and a variety of colorful fish. The overall mood of the image is enchanting and full of life, capturing the essence of a magical underwater world., illustration, vibrant, 3d render, photo