高清写实：西班牙蛞蝓

High-resolution photorealistic image of a Spanish slug, specifically *Arion vulgaris*, viewed directly from above (a true top-down perspective). The slug is positioned horizontally against a pure white background, ensuring no shadows or distractions are present. The lighting is bright, even, and akin to studio lighting, illuminating all details clearly. The focus is critically sharp throughout the entire slug. Depict the mantle as a subtly raised, saddle-shaped area on the upper part of the slug's back, closer to the head. Accurately depict the slug's natural coloration, including the variations of reddish-brown hues. Show the clearly defined segments along its back. The two pairs of tentacles at the head should be clearly visible and in sharp focus. The upper, longer tentacles should be extended forward or slightly outwards, and the lower, shorter tentacles should be visible beneath them. The texture of the slug's skin should be smooth with a subtle gloss, avoiding any excessive wetness or dew drops. The overall style should be neutral and objective, suitable for a scientific illustration or a product label.