Good morning,
I'm asking for help in identifying the problem and possible solutions.
For reasons initially unknown to me, three of my Euphyllia Glabrescens began to die. Day by day, they were pumping less and less, until they finally died head by head. With my Euphyllia Dragon Soul, I accidentally noticed small moving dots on the skeleton and in places where the tissue had begun to die. I turned on my flashlight to illuminate the coral's skeleton and noticed a mass of small black dots (in the flashlight's beam) crawling around the Euphyllia like ants. In blue light, the "bugs" appear red.
Of course, I searched the forum and came across threads about red bugs or black bugs on Acropora, and people don't quite know how to get rid of these uninvited guests.
After examining the entire tank, I see that these "worms" are also crawling on the rock (so I assume they're all over the tank).
The only Euphyllia I have left is a Paraancora. It's pumping nicely and doesn't seem to be doing anything wrong at the moment, but a few "worms" are already crawling around.
I tried to get dip of the Euphyllia that unfortunately didn't make it, but the effort was ineffective. The rest of the aquarium life is fine, but it's mostly soft corals: lots of Zoa, Lobophytum, Sinularia, and Dunka (which is completely clean at the moment).
And now a question for you, dear aquarists: what could this be? What are some possible solutions? I've found that a Chrysus fish—a golden wrasse or a Mandarin—might help, but I haven't been able to find any information that the fish actually managed to cope with the problem.
HELP
Pictures below:

I'm asking for help in identifying the problem and possible solutions.
For reasons initially unknown to me, three of my Euphyllia Glabrescens began to die. Day by day, they were pumping less and less, until they finally died head by head. With my Euphyllia Dragon Soul, I accidentally noticed small moving dots on the skeleton and in places where the tissue had begun to die. I turned on my flashlight to illuminate the coral's skeleton and noticed a mass of small black dots (in the flashlight's beam) crawling around the Euphyllia like ants. In blue light, the "bugs" appear red.
Of course, I searched the forum and came across threads about red bugs or black bugs on Acropora, and people don't quite know how to get rid of these uninvited guests.
After examining the entire tank, I see that these "worms" are also crawling on the rock (so I assume they're all over the tank).
The only Euphyllia I have left is a Paraancora. It's pumping nicely and doesn't seem to be doing anything wrong at the moment, but a few "worms" are already crawling around.
I tried to get dip of the Euphyllia that unfortunately didn't make it, but the effort was ineffective. The rest of the aquarium life is fine, but it's mostly soft corals: lots of Zoa, Lobophytum, Sinularia, and Dunka (which is completely clean at the moment).
And now a question for you, dear aquarists: what could this be? What are some possible solutions? I've found that a Chrysus fish—a golden wrasse or a Mandarin—might help, but I haven't been able to find any information that the fish actually managed to cope with the problem.
HELP

Pictures below:
