Slug (likely a keelback slug or desiccated garden slug)

Damp environments, gardens, under rocks, in soil, or areas with decaying organic matter. They require moisture to prevent desiccation.

Herbivorous and detritivorous; they feed on living plant leaves, decaying vegetation, fungi, and sometimes other small invertebrates.

Nocturnal activity to avoid drying out; they travel on a layer of slime/mucus. This specimen appears dead, potentially dried out, or damaged, lacking the distinct turgidity of a healthy slug.

Risks: Can be significant garden pests, eating holes in leaves and damaging crops. They can also transmit parasites (like rat lungworm) if ingested or handled improperly. Benefits: They aid in decomposition by breaking down organic matter and recycling nutrients into the soil.