Lugworm
Arenicola marina
Lugworms recycle nutrients by swallowing sand and digesting organic material, leaving coiled casts on the sand. Their burrowing aerates the sediment, benefitting the ecosystem. Around Lihou, you might notice their tell-tale spirals on sandy patches at low tide.
- Habitat: Sandy or muddy shores, burrowing in U-shaped tunnels.
- When to See: Year-round; look for coiled “casts” on the sand surface.
- Length: ~10–20 cm