Clam Dying ... What's On It's Shell?

[Rehctelf]

My clam has been slowly dying over the past couple of months ... mantle bleaching and shrinking and overall just looking unhealthy. Not sure what is wrong with it, but there is some type of orange encrustation on it's shell that shoots spider webs out to local rocks. Does anyone know what that thing could be? Could it be hurting my clam? Should I try to remove it and, if so, how?

Thanks in advance for looking ...

 

[duncan-junkie]

Check the foot opening for Vermit snails..... I just lost 2 of my beloved clams that way.   I wish I would have checked sooner,  cause it could have been prevented