Within the mud and sand along the margin of the river, something was stirring. Small worm-like animals were adjusting their position within the sediment, lying in burrows as they fed on small particles carried along by the current.
Within the mud and sand along the margin of the river, something was stirring. Small worm-like animals were adjusting their position within the sediment, lying in burrows as they fed on small particles carried along by the current.