HELP! Something is eating my Stylophora at night!

[jfingers8]

I woke up Sunday morning and noticed that something was eating away at my green Stylophora that night. Then i woke up this morning and looked at my tank before i went to work and something was eating my blue Stylophora. There are sections of both corals that are eaten down right to the skeleton. The parts that aren't damaged all of the polyps are out like normal but i got those sections on both corals that have been eaten away this is driving me nuts. I looked last night like a hour after the lights went off but i didn't find anything. Does anyone have any idea would it could possibly be?

 

[Fuzzfish]

do u have a camelback shrimp in there?

 

[Capt_Cully]

are there any other corals near by them with sweepers that could be stinging them?

Is the tissue from the stylo's gone, or are chunks of skeleton gone too?

 

[jfingers8]

no camelback shrimp and there isn't anything near them that could sting them.

 

[seapug]

RTN/STN?

 

[MarkGP]

<a href=showthread.php?s=&postid=12579754#post12579754 target=_blank>Originally posted</a> by seapug
RTN/STN?

This would be my guess! What are your water parameters especially alk?

 

[jfingers8]

ok can someone tell me what stn and ntn is? water parameters: cal. 425 alk 8 mg 1300 ammonia 0 nitrates and nitrites 0 sg. 1.025 evreything is right on

 

[jfingers8]

the tissue is gone and some polyps are totally gone where there isn't any tissue.

 

[mbbuna]

look in the middle of the night with a red flashlight for a hermodice

 

[saltkreep]

Is the affected area near the bottom. I had the same problem. I had a large gorilla grab. he came out at night under actinics and ripped polyps and tissue off for his feast. Always at the bottom!!!