Is clam moving normal

[jkehoe4]

My Deresa that has been in my 90gal reef for about 2mos has decided to start moving. Is this normal I have not changed anything it is on the substrate and the current flow is good and unchanged. Lighting is 400w 20k radium bulbs. All water parameters good. I feed phytoplankton 2x week along with regular feeding to tank of mysid, brine.

Jim

 

[Peabody]

Some movement is normal....how much are we talking about?

 

[jkehoe4]

It has moved 3-5inches 3-4 separate times since late this afternoon. Its mantle at times looks retracted but right now looks fine.

Jim