Is anyone can tell me what kinds of Actronidae they are? Thanks.
I think that you mean "Acteonidae" instead of "Actronidae".
The right-top shell seems to be similar with the samples shown of the following webpage.
But I'm just a novice in this field, so I'm unable to confirm whether it is correct or not.
http://www.gastropods.com/0/Shell_30950.html
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