Zoas not opening

ChiSox Rabbitfish · Mar 27, 2019

I have a frag of zoas about 9 polyps that haven’t opened in like 2 weeks they are still there just won’t open. Now about 2-3 weeks ago the royal urchin was lieterally sitting right on top of the frag and it hasn’t been the same since. I’m wondering could the urchin have damaged them ?
All other corals are perfectly fine.

ChiSox Rabbitfish · Mar 27, 2019

Phone takes terrible pictures sorry guys

Mjrenz · Mar 27, 2019

Questions:
Water parameters?
How old is the tank?
How long have you had the zoas?
Have you made any changes? (placement, flow, lighting, new additions, dosing, etc.)

ChiSox Rabbitfish · Mar 28, 2019

1.024
PH-8.2
Ammonia-0
Nitrite-0
Nitrate-5

I’ve had these zoas about 6 months
Tank is a little over a year old no changes to lights or placements haven’t done anything different

Mjrenz · Mar 28, 2019

It is really hard to tell from the pic but if they're just closed up they'll probably be fine and may just be upset about something, possibly the urchin. Does it look like they're receding or have any physical signs of damage? Any asterina starfish crawling around them?

MombasaLionfish · Mar 28, 2019

The same thing happened to me. A hermit was crawling on top of them and they were closed for like a week and a half but they opened back up.

MombasaLionfish · Mar 28, 2019

And another time with a different coral I took it out of the water for some reason and a few hours later it opened up again.
I guess it just depends on the coral.

ChiSox Rabbitfish · Mar 28, 2019

Mjrenz said:
It is really hard to tell from the pic but if they're just closed up they'll probably be fine and may just be upset about something, possibly the urchin. Does it look like they're receding or have any physical signs of damage? Any asterina starfish crawling around them?

No they just look closed one of them is open a little bit today I can see the bright orange color