Create a video of a lion cub and a turtle swimming underwater

Animate the provided image of a lion and a turtle swimming. Create smooth and realistic swimming movements for both the lion and the turtle. Ensure the lion's limbs move naturally in a swimming motion, and the turtle's flippers move in a coordinated, gentle paddling motion. Maintain the integrity and resolution of the original image, avoiding any distortion or unnatural effects. The background should remain consistent with the original image, and the water should exhibit slight, natural ripples to enhance the swimming effect.