ID please

[dirk_brijs]

can anyone tell me what this is
it seem to be pulling of its skeleton as you can see in the pictures but I got it for free. LFS gave it to me as he said it might maybe get back better in my tank?
Though dont know what it is?

 

[The_Codfather]

The LFS didn't know?

 

[dirk_brijs]

no he just had it
most likely locally harvested.
would be nice to do some research on it to know how to maybe safe it?

 

[Dr. Fish]

Nice glowing green color though. No idea what it is.

 

[dirk_brijs]

could it be a chalice?
not sure if they have a skeleton?