what is this?!? please help asap!

the mushroom rock is on top of the LR right in front of the pile of shells, but the other corals are on the other side of the tank
 
My friend had a situation like yours, after weeks of searching a found the culprit during a water change.
A massive bobbit worm.

Try taking a flashlight to the tank at night and you may find what is killing your fish...
 
Usually they keep their butt in their home rock & only eat what they can reach. That doesn't mean they don't have a network going between rocks, though. I would imagine mushrooms aren't very palatable as they slime up pretty good, I hear more of them eating zoas than anything else.
 
Not sure if this helps or not, but I forgot we had a clam and a feather duster go as well... obviously, the clam shell was still there, but he was fine one night and the next morning, he was half gone. Same with the duster; the tube was there, but no crown, no worm. Is that of any relevance to the missing fish? Our water quality is "perfect" as per the LFS and our test kits, everything is right on, where it should be.
 
Hmm, I would have thought that the massive loss of fish and inverts is due to poor husbandry techniques, but I guess that can't be the case given your "perfect" water quality.
 
Buzz1329 said:
Hmm, I would have thought that the massive loss of fish and inverts is due to poor husbandry techniques, but I guess that can't be the case given your "perfect" water quality.
Click to expand...

Not sure if that was meant to be sarcastic or not, but our tank has been set up and running for over 10 years and never had a problem with missing anythings until about 2 years ago, which was recently after adding the daisy polyps (which I do assume a hitchhiker came along with) we just haven't seen or been able to catch anything yet. More curious what I should be looking for! We test the water regularly, and like I said, took samples to the LFS several times, and each time, they complimented on how good the water quality was. The manager even said a few times it came up better than some of their tanks. So, yes, I would say our water quality is pretty near "perfect".
 
I know what It is!

Eunicid1.jpg


The face of a KILLER!!

Eunicidworm.jpg
 
The lionfish is the culprit. It ate all your livestock. You better separate it. Anything that fits its mouth are gone.
 
To tell you the truth, I would remove the daisy polyp rock as this seems to be where the hitch-hiker (my bet: eunicid worm) is hiding out. I don't think traps are very effective on eunicid worms since their tails don't usually leave their burrows, and if it is by chance a spearing mantis, they are often too smart to fall for traps. Remove the culprit by removing the rock. Flush the rock with club soda to get the culprit out of its lair. If you are unsure what rock the sucker is in, then stake out your tank at night with a red flashlight until you see the bugger then watch where it heads home to. Then you'll know exactly where it is in your tank.
 
Zukizuri said:
The lionfish is the culprit. It ate all your livestock. You better separate it. Anything that fits its mouth are gone.
Click to expand...

Umm, I believe the OP was pretty clear in stating the lionfish was added AFTER the livestock started disappearing. This point has been brought up already. It would help if you read the entire thread instead of just the first post.
 
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