GSP turning black?

[EnemyAnenome]

Hello, this is a picture of my GSP, if you look closely some polyp tentacles are turning black. Is it dying? I've searched and found no forums for green star polyps turning black so I was wondering if this is a new issue in the community.

 

[Reefing Madness]

 

[Killgannon]

Hello, this is a picture of my GSP, if you look closely some polyp tentacles are turning black. Is it dying? I've searched and found no forums for green star polyps turning black so I was wondering if this is a new issue in the community.

This is happening to one of my GSP right now as well. Anyone know!?!?