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Beach snails
I called these snails "Beach snails", because they remind me of a time when I was back home. We used to go to north of Iran for vacation (by the Caspian sea, which is largest enclosed body of water on Earth) and there were many of these clam snails crossing the sidewalks of the resort, so slow and so calm and they were so beautiful... For more info on Caspian sea: en.wikipedia.org/wiki/Caspian_Sea