What is this ??

[richarddorm]

Does anyone know what is this ?? is this harmful ?
its red color !!!

i just got some live rock and see that come out from the hole of rock ...
should i kick it out ? thank you guys ^^

 

[snorvich]

"christmas tree worm" but difficult to maintain.

 

[Perched Urchin]

Looks like some variety of feather duster. Harmless filter feeder.
Depending on fish you keep, it might become a snack for someone down the road. I used to have a lot of little red ones, but something in my tank apparently has a taste for them, as they are almost all gone now.

 

[SoLiD]

+2 Feather Duster Worm.

 

[richarddorm]

ha～～thank u for reply ^^

 

[SushiGirl]

Christmas Tree worm. The porites that they're living on can be difficult to maintain.