New live rock critters

[Endy]

**Update**

2nd Pic
I caught this thing opened a little and then shut itself up real quick when I flashed a light to get a better look. It must be a clam of some sort. Should he be ok to leave alone??

[Oxymoron]

The small clam should be ok and survive the cycling process. It will open up to filter feed from time to time. I have one that hitchhiked on my LR and it's still alive. I'll add that both the clam and feather duster's are both harmless filter feeders and are beneficial to your tank. Get the crab out while you have the chance lol.