Aptasia and something else?

[William Spak]

Hello All!

Attached is a photo I would like some critter ID, on, I think they may be messing with some of my corals. I've circled the organisms in question

What I think to be aptasia is in red, and the mystery organism is in green. The green ones are little stony rods that are forming all around the tank.

Thanks!

 

[Sharkbait19]

The ones in red look to me like feather duster worms - harmless filter feeders. Good test is if they close up quickly or slowly.
The ones in green look like vermetid snails - bad guys that irritate coral. Break off the tube and cover with super glue to kill.

 

[Ultraman]

Yup

 

[Soren]

+1 red looks like harmless feather dusters and green looks like bothersome vermetid snails.

 

[sixty_reefer]

The ones circled in red seems to be hydrozoa