Something eating/attacking my scoly? Please help identify

[Tanggy]

 

[Tanggy]

I noticed this ulceration on my scoly this evening. I was home at lunch and it appears normal. So something must have gotten to it since lunch time. No fish in DT right now. Going fallow. I have a branch hammer to 2-3 inches to the left of this scoly. This happened to another scoly of mine last week. What do you think is causing this? Thanks

 

[reef lover]

Any shrimp in tank?

 

[Tanggy]

Yes. 1 shrimp, a few hermit crabs and a few snails. I have not seen the shrimp come over to where the scolys are. The only time I see it come close to the scolys is when I am feeding the scolys.

 

[DSC reef]

Euphyllia corals can send out long sweepers. It's possible it got stung.

 

[Tanggy]

I was thinking the same thing. But this happened during the afternoon. I thought corals send out their sweepers at night...

 

[3mm3]

Seen any eunicid worms?

 

[DSC reef]

I was thinking the same thing. But this happened during the afternoon. I thought corals send out their sweepers at night...

They can send sweepers anytime of day. I've had some reach over 7"

 

[Tanggy]

Have not seen any Eunicid worm. To be safe I'll probably move the Duncan and hammer away from the scolys...

 

[LetItReef]

What kind of Hermit crabs?

 

[Tanggy]

I have a few of these guys