I found this on my rocks...it has a hard shell on the outside. It is a slug of some sort I think. When I tried to pull it off of the rock it had a hard grip. Harder than any snail I ever had. It ripped in half as I got it off. You can see half of it in the container. You can see the tentacles in a couple of the pics as well. The other half without the harder shell / head still moves when disturbed.
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Any help would be appreciated.
