Help ID Critter

[reyber340]

Spotted this guy crawling on the glass tonight; anyone have any idea what it is?

 

[reyber340]

Front and back side of critter

 

[Reefing102]

Looks like an asternia starfish. Can multiply quickly. Some call them bad. Others have no issues. I have hundreds in my tank and have no issues

 

[reyber340]

I thought that maybe; I didn't realize they get that big. Thanks for the help.

 

[vetteguy53081]

Front and back side of critter

Best to pull any now while you can as they multiply like mice. They are also very capable of taking down zoas in numbers