Can you identify these anemones?

[Agatheron]

Well. Seems our new aquarium has 3 anemones. I've included pictures of each. I'm sure one is Aiptasia, but it is very small. The other two are much larger (about 1" across), and seem to be the same type.

Anybody able to help? If the two are benevolent, should I be feeding them?

 

[Flreefer]

Not sure of first pic...looks like a good one though like Sebae or similar.
Second pic is Aptasia
Third, I would say is a Carribean Rock anemone. Did you put Carribean live rock in by chance?