Little creatures on my coral frag?

[absaltproject]

One this baby leather toadstool, I noticed a tube that looks like it made of sand and a clear tentacle seems to come out of it here and there. Right next to it, I noticed another creature that hides when I walk by but it’s a creamy beige and has red little frills at the end that comes out.
My question is whether or not these are harmful and is it possible it’s irritating the toadstool? It’ll open up for a while here and there but majority of the time all the polyps are retracted.

 

[vetteguy53081]

One this baby leather toadstool, I noticed a tube that looks like it made of sand and a clear tentacle seems to come out of it here and there. Right next to it, I noticed another creature that hides when I walk by but it’s a creamy beige and has red little frills at the end that comes out.
My question is whether or not these are harmful and is it possible it’s irritating the toadstool? It’ll open up for a while here and there but majority of the time all the polyps are retracted.

View attachment 3177704 View attachment 3177712

Looks like hydroids or aptasia and even spinoid worms...... hard to see on my phone
For any of them, Using syringe, inject kalkwasser powder mixed with tank water into a paste the consistency of toothpaste and inject into the very center core and they will wither away

 

[divewsharks]

Best guess, spinoid or barnacle.

 

[ISpeakForTheSeas]

One this baby leather toadstool, I noticed a tube that looks like it made of sand and a clear tentacle seems to come out of it here and there. Right next to it, I noticed another creature that hides when I walk by but it’s a creamy beige and has red little frills at the end that comes out.
My question is whether or not these are harmful and is it possible it’s irritating the toadstool?

Could you get some pics of the clear tentacle from different angles?

The red frilly thing is most likely a feather duster worm, but it could potentially be a barnacle too from what I can see at the moment - both feather dusters and barnacles are harmless filter feeders that shouldn’t bother your coral.