Duncans mouth very wide open

[Benji k]

Got home and my Duncan’s mouth is very wide open I fed him twice this week would ther be a reason its mouth is open so wide and it’s closed up Abit

 

[Ron Reefman]

Doesn't look that uncommon to me.

 

[Benji k]

Doesn't look that uncommon to me.

This is him a while ago he started opening back up and his mouth is back to normal he might’ve been pooping

 

[vetteguy53081]

This is him a while ago he started opening back up and his mouth is back to normal he might’ve been pooping

This is about normal. The one with the wide mouth likely hungry. Feed them Mysis shrimp 2-2x a week. Here are mine:

 

[Benji k]

This is about normal. The one with the wide mouth likely hungry. Feed them Mysis shrimp 2-2x a week. Here are mine:

Yeah I feed him ahiut 2 times a week but mine never look like yours they never like fulky extend ther polyps I’m not sure why my flow is good and it’s up high in the tank getting a good amount of light

 

[vetteguy53081]

Yeah I feed him ahiut 2 times a week but mine never look like yours they never like fulky extend ther polyps I’m not sure why my flow is good and it’s up high in the tank getting a good amount of light

Moderate light, not too bright and what are you feeding it?

 

[Pod_01]

Just for reference here is mine:

sitting next to SPS corals in a path of VorTech MP40.

I feed corals sparingly, I try to depend on fish poop. So I do feed the fish 3-4 times a day.

Just out of curiosity how are your water parameters? Salinity, Alk, NO3 and PO4? How old is the tank?
Duncan’s corals are not demanding, but from my experience for them to shine you do need ideal water parameters.

Good luck,

 

[Reefkeepers Archive]

They often do that either when expelling waste or when the lights are about to turn off as they are "deflating", nothing abnormal

 

[Uncle99]

This coral for me sulks easily.
A minor light change, any move, any touch, a fish to close.
Super resilient, but sensitive.
I dont feed mine directly.
Let it sulk without change.

 

[Benji k]

Moderate light, not too bright and what are you feeding it?

I’ve been feeding it a good amount of mysis shrimp