What snail is this?

[Yamaha1634]

Snail hitch hiked in on a new lobophylia coral. He's a big hitch hiker! Is he a trochus snail?

Have him in my QT for now while deciding if i want him in my DT.

 

[Reefing102]

Looks like a ninja star or star snail. Reef safe. Not to common around here anymore

 

[Drummingbaker2010]

it could be breed of astrea. I know there are a few. It kind of looks similar to one that I have now.