What is it

[tatasker]

i looked in my tank and saw one of the Rocks had flipped.

Saw this but didn't know what it was.

 

[Lionfish Lair]

That's a Foraminiferan.

 

[Lionfish Lair]

I just looked and there's not many pictures out there, if you google search images. Here's a link that may help you. Foraminiferans.