Quote from his site:
"Much debate whether these guys are good or bad for your tank. There is an aiptasia which is also known as "glass anemone" that orignates out of the pacific. When people attempt to kill them by remove or pullin on them, they shatter and replicate massively taking over your whole tank. The Curly Cue is not as prolific and spreading, but if you do remove them, use Joes Juice and inject the mouth or the stalk. This person has 5 which have not been touched. They have not spread but have grown. The curly cue looks darker than the typical Indo glass anemone.
This is an aiptasia family anemone from the Gulf. It's a filter feeder which will not take over your tank like its cousin the pacific aiptasia or glass anemone. The curly cues dont need to be killed as others are."