actually.. I take that back, I have a couple rics behind a rock that is up against glass (which I can barely see) And..kind of looks like this...which is right below where I found this. I have never kept rics on purpose...do they have the sucker feet like this looks like it has?
I dont think they can move like nems. Try placing it some where with no flow and keep it in the cup see if it moves out of the cup over time that will help with to see if its a nem or not
its a beat up BTA, its not a mag the tips are wrong and you can see some of them bubbling a little. Does it have white lines on the oral disc? If so BTA