An organism, especially a burrowing marine worm (like the lugworm), that lives in sand or sandy substrates.
From Latin 'arena' (sand) + 'cola' (dweller, inhabitant), literally meaning 'sand-dweller.'
Lugworms are arenicola champions—they create extensive burrow systems in beach sand that aerate the soil and provide homes for hundreds of other tiny creatures, making them ecosystem engineers!
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