Star shaped things on my glass

[mraysberg]

Today I was doing my water change and I noticed on the glass a little star shaped thing. It was very small but def star shaped. Is this bad for my tank? Or should I be worried

 

[Scotty Buttons]

Got any pics?

 

[mraysberg]

I should’ve took a picture but I didn’t think. I just removed them ASAP

 

[Ignitros]

probably asterina. harmless unless they get out of hand then it just gives you a reason to buy a harlequin shrimp.

 

[mraysberg]

probably asterina

How do I get rid of them? Also is that bad?

 

[Gareth elliott]

Most people say no issues, there are some reports of some species eating corals.
Bumble bee shrimp are an option unlike harlequin shrimp eat more than just star fish. But are also smaller so the chances of them being eaten themselves by fish is greater. Especially if added when fish are already present, add at night and use a container they can climb out of and dart cover instead of falling through the water column where they can be picked off.