that i know of no you cant tell if they are or arent.
If it gives birth, or it's eating habits change drastically. Should the snail in question be carrying young, it will no doubt change it's behavior in noticable ways.
put water in it or shake the snail.
slow move ments
you look at the bottom of the snail try to take the snail out of its shell if it is black it is a unknown snail if it is all white it is a afarcan snail
i do not know my apple snail layed eggs i do not know what to do
you can tell the age of a snail by looking at its shell
it is called a, never mind I don't know//// It's called a snail because ADAM FROM THE BIBLEEEEEEE NAMED IT SNAIL
you can tell if your water snail is pregnant because it will start climbing up more untill it is just under the water line and it will just stay there for a while. It will also be moving around much more than normal and it will be looking for more food than regular.