Is this an asteria star?

[Emmanuel Zamora]

?

 

[Crabs McJones]

?

asterina starfish, yup some consider a pest. If it's in the sump you can leave it But they populate very quickly

 

[Emmanuel Zamora]

Thanks buddy! Will do, it’s in the sump! Thanks for such a fast reply

 

[Halal Hotdog]

My view is that they are a pest. They reproduce by fission and literally one can become two in a matter of a day. Some have reported them eating corals like zoas. They are not the worst thing in the world. Most reefers live with them and have no major issue.

 

[Emmanuel Zamora]

Thanks pal, I’ll leave him in the sump then!

 

[AdamNC]

The ones I have I love them. Not the coral eating type and they help supplement my cuc. Just like with anything they will self regulate if you keep a clean aquarium.

 

[tiggs]

It can be tricky, because Asterina is a genus of approx 20 different species. Some of them are completely harmless and act as members (although not super significant ones) of the CUC, while others eat coral and cause damage. Personally, I've never had the pest kind, but they definitely do exist.