What is this guy doing?

[bradjmx4]

He went from flat to this in a hour...

 

[SwampyBill]

How long has it been in your tank? Looks like it's just getting more comfortable & acclimating to your tank. Good luck!

 

[Alohadood]

Looks like you thought you had a discasoma but actually have a richordea. That's a coral btw, a mushroom, and more specifically a richordea Yuma it looks like. Totally normal for it after acclimating. be sure to give it medium to low light. Gentle flow. And plenty of food. They will eat a TON.

 

[Alohadood]

That's ricordea without an h. My phone is very insistent on adding the h...