My clarkii is biting my clam!!

[heatherromlein]

I have just noticed My female clarki who is about 2.5" long, nipping the mantle of my squamousa clam-and bad!! I also noticed her picking at a piece of goniastrea brain. Has anyone else had this happen?? I have never had a problem with clarkii's in the past, is there anything I can do??..... She is about nip away from being demoted to the sump!
Thx!

 

[kretzkiller]

Do you not feed her enough?

 

[heatherromlein]

She is fed 1-2 times a day, tons of pe mysis shrimp, hikari pellets, and prawn.