Clam Spots

[Sailorman]

I have a clam that has about a dozen small (pea sized) white or grayish white scrapes or spots on its mantle. They look like scrapes but the clam has been in the same place for a couple of months now and has not been 'scraped' by anything. It's got plenty of light and I give it Phytoplankton on a regular basis. When I brought it home it seemed to have a couple of these and now it has several, so it can't be good. Otherwise, the clam seems fine. Open all the time, no gapping as far as I can tell, seems quite responsive to stimuli. Anyone know what these could be?

Calc/Alk are fine as is Ph/nitrates etc...

 

[Ben1]

Can you get a picture? What is plenty of light, just wondering?

 

[kevindub]

It might be the normal pattern of the clam. Or sometimes detritus or sand gets on it.