Aiptasia Killing Clams?

[MarkoD]

In the last 2 weeks i've had a huge increase in the amount of aiptasia in my tank, they're all over the sand and rocks.

some were even on the sides of the clams.

I've lost 2 clams now in the last week.

could it be that the aiptasia was stinging the mantle and causing stress for the clam?