Is this asterina starfish damage?

[Yellow Coris Wrasse]

I’m new to SPS and I need some help. I had a stylo frag in my tank for three months and it was growing well and showed lot of polyps. I woke up one morning and it looked like all the polyps had been stripped off the coral, starting at the base and working up.

A few days later my two birds nest frags showed similar white areas, starting at the bottom of the coral.

My water parameters are good, and they have remained stable, so I do not think it is a water chemistry problem.

I started looking closely and found several small starfish in the tank; I am assuming they are asterinas. I pulled around 20 of these little starfish out of the aquarium.

Does this look like damage from asterina starfish or should I look to a different cause?

Thanks for your help.

 

[chrisjj625]

Looks like STN or RTN to me.

 

[bobby.w.hodges]

Clip the healthy tissue off and seal the bottom with glue to save that frag.

 

[sreefs]

Not damage from asterina ! IMO
agree looks like STN as said, Check water and list water parameters, also what test kits used!

 

[BTimms]

Looks like STN or RTN to me.

What is STN and RTN?

 

[Hydrored]

What is STN and RTN?

Slow tissue necrosis / rapid tissue necrosis