Strange mark on frogspawn stalk

[Idaknow15]

Frogspawn coral looks happy enough but I noticed this strange pinkish with white outer mark on the stalk this morning.
Just wondering if it’s anything anyone had ever seen before and if it is something I should be concerned about?

 

[fishguy242]

hi,is that an asterina starfish? can you post a closer pic ?

 

[Isopod80]

Yup, it's an asterina. Best to remove it from the tank. They are pests. Keep an eye out for more especially after lights out.