Good or bad guy?

[ryanc1025]

Can anyone help me id these two things? One looks similar to a feather duster but is popping up on rock and in zoa colonies. It does cause thr zoas to close periodically.

Not sure how to describe the white things on the branch rock? They dont appear to be affecting anything but theyre popping up everywhere.

Thanks in advance

 

[GSPClown94]

Not sure how to describe the white things on the branch rock?

The blue things?

 

[ryanc1025]

Lol my bad, forgot white light helps. The feather looking things and the white web like things.

 

[vetteguy53081]

Lol my bad, forgot white light helps. The feather looking things and the white web like things.

Looks like aptasia - pest anemone. Keep it simple . . . . . Using a syringe or pipette, inject either lemon juice or better yet. . kalkwasser powder mixed with tank water into a paste the consistency of toothpaste and inject into the very center core and it will melt away

 

[GSPClown94]

Lol my bad, forgot white light helps. The feather looking things and the white web like things.

The silhouette in the first pic looks kind of like aiptasia but I’m not sure. Can you get a clearer picture? The white things in the second picture look like they could be tunicates.

 

[ryanc1025]

Here's the best pic I can get. Theyre in the sand, on rocks, in zoa colonies. It doesn't look like aptasia, it similar to a feather duster

 

[BonnieB]

If you’re sure it’s not aiptasia then perhaps a feather duster. The column in an aiptasia will be fleshy, flexible column made of soft tissue while on a feather duster it will be paper like, fibrous, leathery, or sometimes calcareous (hard and chalky, like a little shell).

 

[GSPClown94]

Here's the best pic I can get. Theyre in the sand, on rocks, in zoa colonies. It doesn't look like aptasia, it similar to a feather duster

Yeah those look like feather dusters

 

[ThisIsTheWay]

I agree the first look like feather dusters and second look like tunicates.

Here's a thread of someone else who has/had tunicates that look similar:
https://www.reef2reef.com/threads/tunicates.920160/

 

[ISpeakForTheSeas]

I'm late, but those are feather dusters (harmless) and colonial tunicates (I usually recommend isolating the colonial tunicates on their own island in case they're an invasive kind, but excluding the highly invasive ones, tunicates are also harmless filter-feeders).