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To be honest, the clam doesn't look too good... Being retracted with its hole gaping that big is not a good sign... The anemone is bleached out as well. The tank seems pretty new. Was it cycled? How old is the tank? Parameters? Sorry to be so straight forward but I don't think your tank is ready to house those inverts yet.
Add a lot more rock and that clam is gaping very badly. Those look like Maximas, what type of lighting do you have and how old is the tank? I also agree the bubble tip looks bleached. It would be helpful if you could give some tank stats like how long it's been running, ammonia, nitrite, and nitrate.
Guys sorry this pic for the clam is old when i started this tank and sure this clam died the day after,,,my tank running for 5 months...i think it's full cycled now,,and for the live rock ya u will buy more..thanks guys