Sick Clam!

[LilReef]

I’ve owned this clam for around 12 months and have today noticed a huge issue. It seems to be retracted into its shell but won’t close it’s shell (I’ve tried bumping its shell, moving it, gently poking the lip with a syringe but nothing makes it move its shell)
Two or so months ago I noticed it had detached it’s “foot” from the rock under it, but considered it was fine since it still looked healthy after two weeks. My local marine fish shop said that it probably wasn’t of any concern if it still looked healthy so I left it at that.
I ended up gently picking it up to get a closer look and it still didn’t close. It looks like it has started to detach from it’s shell? Half of the bottom is basically detached and I’m extremely worried and not sure what to do. Is there anything I can do to help it??
I didn’t notice sooner because I’ve been caught up with schoolwork, so I hope it isn’t too late

 

[Lemons]

I hate to tell ya but that clam is lost cause... if the clam isn't closing and or reacting at all it is likely already dead... remove it from the aquarium and let it dry outside for a few days. Get all the gunk off and bleach it. And add it to the "reefers graveyard"

Edit* also do the sniff test... if its rotten its... rotten

 

[LilReef]

I hate to tell ya but that clam is lost cause... if the clam isn't closing and or reacting at all it is likely already dead... remove it from the aquarium and let it dry outside for a few days. Get all the gunk off and bleach it. And add it to the "reefers graveyard"

Edit* also do the sniff test... if its rotten its... rotten

When I have touched it, it does move a bit but it just doesn’t close. Im really worried because it was quite expensive when I got it
Is there nothing at all that I can try to do?

 

[Lemons]

When I have touched it, it does move a bit but it just doesn’t close. Im really worried because it was quite expensive when I got it
Is there nothing at all that I can try to do?

Not to my experience. I had a maxima do something very similar, one day i woke up to a half empty shell

 

[ArachnoJoozt]

This clam has not been well for a long time, since there is no new shell growth, even on the inside of the shell. If I would guess it would be light starvation.

I agree that this clam is a lost cause unfortunately

What is the species, crocea? Do you know how much par the clam was getting? Maybe a picture of before it was closed up?

 

[Dburr1014]

I think it's about gone. When they start it's usually too late.
How much par was it getting? No new shell growth is a bad sign.

 

[twentyleagues]

That has been long dead unfortunately. Take it out if you haven't already.

 

[minus9]

Starvation. They hang on for a long time until it's too much. As mentioned, no new shell growth and it slowly starved to death. There should never be coralline algae on the top/edge of the shell like yours.