Shell Description
The shell of this species is globular and can, under the right conditions, grow as large as 125 mm (7 inches) in maximum dimension.
The operculum is large, ear-shaped in outline, and is corneus and somewhat transparent. On beaches where the shell of this species washed up commonly, the operculum will usually also be found washed up in the drift line.
Read more about this topic: Northern Moon Snail
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