How do you know how old is a snail?

Answer 1

you can check their ages by counting the cracks on its shell.

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The bigger the snail is the older it is, also as snails age they move slower. Cracks on snails shell happen natrually, if they are dropped or something heavy is dropped on them, a crack can form. A young snail might have more cracks then a very old snail.

Answer 2

you can tell the age of a snail by looking at its shell