Can anyone ID these?

[steve40]

They are just little hitchhikers, but I would like to put a name to what I am looking at.

 

[steve40]

Oh yeah and what about these little guys.

 

[krishj39]

Ok, sorry to add more info on you again Steve, but I thought it would be helpful for everyone to know the corals in the first pic are a stony coral, not button polyps or something.
Second pictures looks like hydroids, which are the one of the phases of jellyfish....I don't remember seeing them in your tank before.

 

[dburr]

2nd pic is red feather dusters. They stay small like they are and are harmless.
What does the first pic feel like? hard or soft to the touch?
Dan

 

[007]

I am on the fence about the second picture. Either feather dusters or hydroids. A clearer picture and a detailed description of behavior will help to give an accurate ID.

 

[spsfreak100]

The second picture are Hydriods. I've been unfortunate enough to have hundreds of these things in my tank. They also spread quickly.
My hydriods have come in contact with a few species of Acropora, Montipora and Heliopora, with no bad affects as of yet. But, that doesn't mean that eventually there will be bad affects.
I attached a picture of one of my "hydriod colonies." >>>This<<< picture shows the calcareous tubes of the hydriods, and the picture attached shows the oral disk along with the tentacles.
Graham

 

[steve40]

The first picture does feel hard but it has a soft covering, it does appear to be spreading a little (which I think is awesome if it covered that whole rock).

 

[bang guy]

First picture looks like Porites to me. I can't tell if the second is dusters or Hydroids. Like SPSfreak, I'm leaning toward Hydroids.

 

[dburr]

I must be the only one to see the tubes. Gram's pic doesn't look anything like the second pic.
Take a clearer pic, then we'll know for sure.

 

[jonthefb]

i agree that the first is a stony, looks very similar to a porites but hard to tell...second pic also looks liek either hydroids which are nasty or featherdusters, which are good!
good luck
jon

 

[j21kickster]

the first pic- is it hard- if so it is common to see porites on live rock- especially the brown variety- althought they kind of look like zoanthids that have overgrown a once stony coral- but....

 

[j21kickster]

on second look- they sure look like zoanthids- especially b/c the color varies between the polyps

 

[bdhough]

I don't know where you guys get porites for the first pic but i think we need a better picture, as well as some contrast for size.....
Im of the mind that its a very young favia colony but favia "mouths" are bigger and i've never seen a small colony before. There are alot of stony corals out there with the distinct borders that im seeing such as madracis or stephanocoenia. Heck i can even almost make out stalks and a head polyp leading me to think it might be an unexpanded alveopora, which i doubt it is but you never know.....
Another pic if you can STEVE40