My girlfriend's corals?

Nope...it's not an aiptasia

It's a non-photosynthetic dendrophyllia. I just don't have any of my books right now so I can't ID it.

 

I think they are flatworms from the photo
Google Image Result for http://www.advancedaquarist.com/images/may2002/Aceol-flatworms-on-glass-webthumb.jpg

This article also has advice on a flatworm preditor. I dont know if you were trying to get us to ID the anemone, or the orangish-reddish growth on the rocks. This is my two cents worth of an ID for the orange stuff.

 

No, the corals, like the title says ...

Inwall has got it right, I'm pretty sure. I just can't find that little bugger anywhere online, except for pictures OTHER people have posted trying to ID it. :-/

Whatever it is, it's very cool in a nano, where you can see it up close. Very hardy. It hitchhiked in, and survived the cycling process, and a learning curve where every possible mistake was made.

It's a big eater, too. She feeds them suprisingly large chunks of shrimp and silverside from her fingertips.

 

I highly suspect it's of the Paracyathus Genus. I don't know the species. I still don't have my books. You can PM Schackmel. She has the books I need to positively ID it and can look up Paracyathus and tell you if I'm correct or off my rocker.

 

Eureka!

Phyllangia Americana ... hidden cup coral.;D

 

A lot of the cup corals from the dendrophylliidae family are quite challenging to ID properly. Actually, often you need a microscope. But your ID is as good as mine. And yes, they are pigs. They are non-photosynthetic so they do need to be fed.

 

Google search on cup coral. It looks like the same type that i found on some rock in my tank.

 

do they have a hard base (like a coral polyp?) or do they move around. If it is like a coral i would guess some variety of sun coral. If not i would same something related to orange ball anemone, i have those in my tank they like the shade and have orange tips to the tenacles, yours look just like it without the orange tips