I have mentioned in the forum that I have two nerites which I bought in 2011. This afternoon, I finally managed to take some photos of the zebra nerite to show what an elderly snail can look like.
But first, some photos of it when it was younger.
Taken in April 2016. There are a few pits starting to appear in the shell, and the apex was already eroded by this time. If you look carefully at the shell opposite the apex, you can see a crack just starting to develop.
October 2018. The crack has widened a lot but the snail doesn't seem to notice. It is interesting that the stripes on either side of the crack are a different shape, and go in different directions.
I'll put today's photos in the next post.
But first, some photos of it when it was younger.
Taken in April 2016. There are a few pits starting to appear in the shell, and the apex was already eroded by this time. If you look carefully at the shell opposite the apex, you can see a crack just starting to develop.
October 2018. The crack has widened a lot but the snail doesn't seem to notice. It is interesting that the stripes on either side of the crack are a different shape, and go in different directions.
I'll put today's photos in the next post.