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If you have a pet snail, or have seen a snail in your garden with crust on the hole of it's shell, well, first, good job at being so observant! What you have discovered is a snail in hibernation! Yes, believe it or not, snails do hibernate. Like bear, squirrel, and bobcats, some snails fatten up in the summer and burrow down in the dirt to escape the cold winter months. The snail will sustain itself on the extra fat they've stored. Once the snail has burrowed down, it (most snails are girl and boy at the same time, like flowers) will make a white, crusty layer over the opening of it's shell. HAve you ever noticed a trail of slime behind a snail? They use that mucus to cover the opening of their shell, and then it hardens. When Spring comes, the snail can simply knock the crust out with their head, and enjoy the world once again. Sometimes, a snail will go into a slight hibernation, called estivation, when condtitions are not the best for them. Then, the mucus coat will stay moist and not harden.

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12y ago
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14y ago

I would assume that it's just the way the shell is.

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Q: What does it mean when a snail has black lines in the middle of its shell?
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What is the circumference of a snail shell?

Different snail shells are different sizes. If this question in refering to your own snail, measure the whole distance across in th middle of the snail shell. That is called diameter. Then multiplying by pii (3.14). That answer should be a well done estimate for your snail shell. :)


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It is secreted by a portion of the snail body called the mantle.


What is the oldest part of the snail shell?

The oldest part of a snail's shell is the center of the coil. When the snail grows, it grows outward


What is the body covering of a snail?

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