Poop? Tentacle? Parasite? Alien?

[Mikeskiba86]

Apologies for what is probably a really amateur question, but what is this coming from my Duncan? I fed reef roids for the first time today when I came home from work for lunch. Come back 4 or so hours later to see this.......

 

[DangerDave]

Looks like poo to me...

 

[Mikeskiba86]

Looks like poo to me...

Thank you!

 

[Bayareareefer18]

One of my torches does that periodically

 

[rkpetersen]

Corals expel excess zooxanthellae algae from time to time.
It can be nothing to worry about, if the coral is otherwise healthy.
Or it can be a sign that the coral is stressed and starting to bleach.

 

[Mikeskiba86]

Thanks for your replies. The corals fine it seems, so nothing to worry about. Just the first time I’d seen it like that [emoji16]