HELP Coral Eaten at Night!

[nepenthes99]

I just woke up to see my frogspawn, which was 5" across and totally expanded and healthy yesterday, completely dead to the skeleton! This has also happened to all my acans and my chalice and my softies are also quite agitated. I have no idea what could be causing this. My first culprit was a eucinid but I almost disassembled my tank trying to look for it and found nothing. Plus, this is occuring throughout the tank. Here is my livestock:
-Serpent star (Voracious, killed a coral shrimp and ate it withing 10 minutes of the shrimp's purchase)
-Longspine Urchin
-Blue legged hermits
-Turbo snails
-a nassarius snail
-two small damsels
-a condy anemone (nowhere near any of the affected corals, also agitated)
This all happened overnight. I have no idea what could have caused this. Any ideas are greatly appreciated.

Thanks,

nepenthes99

 

[Esage]

Lately some of my LPS have been eaten at night ,before the LPS its was my zoanthids . At this time I'm blaming the larger amphipods that are in the tank. I'm going to purchase a six line or scarlet wrasse and see if that eliminates the problem

 

[IloveGreatDanes]

Have you tried getting up in the night with a flashlight and looking in the tank? This is how I found out what killed my zoas.

 

[MechEng99]

I was having a problem with some of my chalices and acans going in the middle of the night... Finally found a monstrous Asterina-looking starfish eating them one night. They have great camo, so it took a while to find it.

 

[kurt_n]

I can't fathom anything you've listed being able to take down a coral overnight. I'm with the others... you've got something you don't know you have. My first thought was brown jelly disease, as that can act pretty quick. But you'd see brown jelly hanging off the skeleton. It's not like it eats things away and disappears.

Are the skeletons picked clean in the morning? Or are they just unhappy?

I've had aggressive amphipods take out zoanthids and cause issues with some of my SPS, but it's never an overnight thing.

 

[bellis31]

Maybe not a pest maybe your water is off all of the sudden??? Check salinity and all the usual suspects...