Please Identify

[Mech Eng]

I am just setting up my 1st SW tank (to eventually be a Reef tank).

Last night I noticed these




What are they? Good / Bad / indifferent?

They are out night and day.

Tank is at 79 deg F
Salinity1.025
Phosphates 0.25
Kh 7 / 125ppm (low as of last nigh WC happening today)
Ca 460ppm
Nitrates 0

Thanks

[Zoaelite]

Looks to be Star Polyp or Clove Polyp, harmless softie that can grow very fast on you.

[Mech Eng]

Thanks

[Norstar]

I would get rid of if you don't want it to take over your tank!

[bignose]

green star polyps. very nice if you are setting up a softie tank.