couple of Id's needed

[Beefyreefy]

Found these tentacles sticking out of my mushroom covered rock... Thinking bristle star hopefully? there is actually probably 5 more of them in various holes on this one tiny rock so I hope nothing bad! Then if you zoom in a little bit, literally just above the left most tentacle, there is a small worm like creature that I actually discovered while taking this picture; I have no idea what it is... Now if you skip down below, I have a scary hitchhiker, I think.

So my hammer coral start to remain in a much smaller state then it used to, especially one head in particular. Just by chance I noticed this little guy in the pics below. I fear aiptasia, but it kind of looks like a feather duster too (I'm really new at this, forgive me!). I'm leaning towards aphasia, just give me the confirmation. I will super glue it into it's hole. The one thing that makes me uncertain is that it almost looks like it is coming out of a tube/tunnel along the surface of the hammer branch. Either way, could whatever it is be effecting the health of my hammer? It is one of my first corals and one of my favorites. Please help fellow reefers! Thanks in advance.

 

[KJ]

Yes brittle star and Yes feather duster
Worm?

 

[Gareth elliott]

Third looks like a feather duster, lacks the central disk of aiptasia.

First one does resemble an echinoderm. Though sure someone that keeps them will know better.

I dont see a worm. I think i see a barnacle if i zoom. But that could just be me trying to find it lol.

 

[Beefyreefy]

Third looks like a feather duster, lacks the central disk of aiptasia.

First one does resemble an echinoderm. Though sure someone that keeps them will know better.

I dont see a worm. I think i see a barnacle if i zoom. But that could just be me trying to find it lol.

Yes brittle star and Yes feather duster
Worm?

I zoomed in and photoshopped the worm in question to see it better. the tip of the left most tentacle points directly to the worm.

 

[Gareth elliott]

I dont see enough detail to even be able to say its not algae, sorry
Did it move while taking the pictures?

 

[Sagecritter4life]

Kinda looks like legs on this little fella (micro brittlestar) maybe...not worm

 

[reef lover]

Peanut worm I see him in there ! He's a good guy!

 

[Beefyreefy]

Kinda looks like legs on this little fella (micro brittlestar) maybe...not worm

I decided it's definitely a micro brittle star. This picture confirms it! Thanks.

 

[Beefyreefy]

Peanut worm I see him in there ! He's a good guy!

I just looked up peanut work and you are correct!!! Thank you for the help. Plus, I think you were the only person who actually saw the worm I was talking about, Lol.