How long have you had them for? Have you made changes to lighting, or have your water parameters been fluctuating? Have you moved them?
I've found that zoa's are not as easy as most people say.
I am located in East Hillsboro and work near Cedar Hills.
I have 3 half inch babies, at $10 each. I also have a few more not pictured here.
Also including shot of my largest shroom just as an example of how they look when they get bigger (the tentacles get long and plump).
The middle portion is about 4-5 inches when the lights are on, with the tentacles adding another 4-5 inches on each side. So about 10 inches from one end to the other.
Selling because it's simply too large for my 20 gallon.
$80 located in Hillsboro.