Maxima killed

[shramj]

I lost one of my Maxima clams during the night, he was looking geat and I actually think something may have attacked it since my levels are good. Can anyone tell me if any of the following would kill a clam? I am trying to find out what possibly happened to this guy.

Cal 450
alk 7.9
salt 1.026
temp 78


firefish
6line wrasse
royal gramma
hermit crabs
emerald crab
fire shrimp
cleaner shrimp

 

[quicksilverq]

Can you post some pictures plz. of tank maybe fish or clam befor he died