The snail will still grow even though it lives in an aquarium, so yes the snail will out grow it's current shell and need a new one.
either it has grown out or the snail has died and the shell is just left over and nothing is in it.
If the snail(s) are still transparent then if the fish see it they will most probably eat it because its shell is not hard enough to protect it.
That is probably what is called the operculum. That is a door that the snail closes behind itself when it pulls back into the shell.
yes a baby snail will die if it's shell is chipped because a snail shell is very delicate and so is the snail.
crab making its home in shell left out of snail
when a snail is born it has a shell, and its actual body is still growing in the shell.
The snail's shell will get writing on it. What do you think.
It is secreted by a portion of the snail body called the mantle.
unfortunately that happened to my snail. it left its shell hid under the rocks and died. i think the shell was getting to small. if you put a bigger one in there you might save it
The oldest part of a snail's shell is the center of the coil. When the snail grows, it grows outward
Snails can float or sink depending on how they feel at the time. It is also possible that the snail is dead and sealed into its shell. I would remove it from the aquarium and into a small container for observation. (That would be better than adding a dead snail to putrefy in your aquarium.)