Saving a CHEWED coral

How do I edit the first post to remove the "Emergency" tag? This is no longer urgent. Damage as been done, I'm healing the favia. The chalice, goniopora, and one mushroom are long gone.

I spent 2 hours late last night and was able to catch the two of the 3 shrimps using bait, multiple bottle traps, and a net. The 3rd peppermint is the smallest and I don't think has developed a taste for coral yet, but he's still going to be condemned.

Here's a mugshot of the two murderers in a QT jail tank. They're both pregnant with eggs.

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I had a peppermint shrimp to take care of my aiptasia problem. The shrimp never touched them. So I purchased a second peppermint, and that one ate aiptasia.

Eventually the first shrimp learned from the second shrimp that aiptasia were edible. So they both went to town on the aiptasia.

Once there were no more aiptasia to be seen, they started munching on my flower nems. “Adaptable, they are”. So I had to move them out. Never trust a peppermint. They can adapt to what they eat.
 
I don’t know if it was mentioned, but is there a chalice coral or galaxia, or one that is known to sting with elongated tentacles at night?
 
I’m fortunate so far. I have two Lysmata Bogessi shrimp. They’re often called peppermint shrimp as well. Mine are a little over a year old now and haven’t gone for any coral in that time. The first night I had them they ate the only two aiptasia I had. I haven’t seen one since.

True peppermint shrimp, Lysmata Wurdemanni, are another story. I’ve never had any even look at an aiptasia but they had no problem stealing food from my Micromussa Lordhowensis years ago.
 
Nothing that would pick on corals. They all go to sleep at night, but here is the list:
  • Royal Gramma
  • 2x clownfish pair
  • firefish
  • chromis
  • damsel
I have various snails, shrimps, and hermit crabs. It was on a frag rack so I know hermits can't get to it. I don't think snails would do this, so I think the perpetrator might be peppermint shrimp or at least 1 polyclad worm. Can worms eat corals this quickly, and in this pattern?
Peppermint shrimp is my bet. I have one that does an amazing job devouring aiptasia. But as soon as their gone he goes after LPS. Looks alone like an acan he got to before I figured it out.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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