what causes the center of my zoas to "nipple" out

[tag]

all my zoos have the center pointing up like they are trying to reach for the lights.

 

[Dubbin1]

They must be chilly

 

[tangey]

ha thats a good one dubbin1

 

[tag]

lol...but i'm serious...

 

[ficklefins]

tag. I'm not sure anybody really knows, or at least I don't

Try an experiment in your tank. Frag your zoas and place them in different areas of your tank. Here are a few things that may change their nipply look.

Light
Flow
Nutrients

 

[bobafett]

You forgot to mention temperature