Complex sentence: This large sea snail lives on muddy bottoms, in littoral and shallow sublittoral zones, to a depth of about 20 m. Poutiers, J. M. (1998).
Split into simpler sentences: This large sea snail is known to live in littoral and shallow sublittoral zones. It usually dwells in muddy bottoms at a maximum depth of about 20 m. Poutiers, J. M. (1998).