Clam mostly closed

[Velodog2]

I've had a 4" crocea for about a year now and it's been fine every single day until 2 days ago. It is now mostly closed. It's mantle is extended perhaps 1/4 of normal. It is still responsive to touch, it just doesn't open fully. I can't find anything bothering it. Do they do this? How long can it survive like this?

 

[Tom@HaslettMI]

Sounds like it is stressed. Did you make any changes to the tank recently (e.g., change lighting, big water change, ect.)?

Tom

 

[Velodog2]

It's better now. Not sure why. I inspected it and found what I thought were bubble shaped pieces of algae near its rim but which turned out to be filled with goo like a polyp when I tried to scrape them off. Not sure what they were or where they came from, and never saw any tentacles, but perhaps they were nestling the clam.

 

[fernis]

Great to hear the clam is happy again.