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This is a species of dragonfly in its aquatic larval stage.
Here's a link to a google image search (but without much finer detail on the photo there's no real way to identify the species). Someone may be able to get you a genus, but that someone isn't me.
Ali Hemati Pour, you are very welcome.
However, I am not sure I understand the question. C. fluminalis belong in the wilderness right where you find them. They are a normal part of those ecosystems. Was I able to answer your question with that or did I miss?
I really think this is C. fluminalis, and not C. fluminea. C. fluminalis is native to where you found this shell, and is differentiated by having 15-23 ridges per cm, whereas C. fluminea has 7-14 ridges. And C. fluminea is not known to be introduced to Iran.