Clams messing with my landscaping

[Europhyllia]

I got a second clam. It's so pretty

I even got a book on clams to take better care of them and it suggested that new clams should start out towards the bottom and then move towards the light gradually.
So I did that of course and now a day later the clam has already anchored itself to that bottom rock.
Now I have to find a place to move that big old rock gradually up my landscaping (because the book also says not to remove an attached clam).

I just wanted to mention this in case another clam newbie reads this.
Clams attach themselves super fast. Put it on a little rock or in a little bowl with some gravel. Anything smaller than the football sized boulder I am moving up right now will work...