Microscopic Flatworms On Scoly

Comic_Reef

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Good afternoon everyone, hope all is well.

I have a small Scolymia that is about the size of a single small acan polyp. It had been in decline for reasons I could not identify for a while. Par and water parameters were great for a Scoly, he gets fed 2-3 times a week and everything else in the tank is thriving. I decided to zoom in on him to ID any pests. First I saw nothing and then noticed tiny, tiny black dots moving about. I did a dip and drop by drop put the dip under a microscope to see what I could find.

The video of the coral (sorry about the quality) shows just how tiny and numerous these were on this poor scoly. I did a dip with Fauna Marin Dip followed by Iodine on day one. A few days later I went with some Dr G's. A few days after that I hit it again with some Revive and an Iodine bath. He puffs up nicely after each dip and the worms disappear only to crop back up a few days later. The scoly's behavior the day after each dip tells me that these critters are definitely causing irritation and causing this coral's decline.

The microscope video (ignore the back half of the video, forgot to turn off the camera) shows a bit more detail of the worm up close. Based on what I could find online, they do not appear to be Red Planaria as these things are tiny and do not have the defined points on its backside. What it is crawling on is a very small Serolid pod.

I was not able to ID these on any other coral in my tank even those directly adjacent to this Scoly.

See attached videos. Any help is largely appreciated. Thanks.
 

Attachments

  • Scoly Pests.mp4
    74.8 MB
  • Microscopic Flatworms.mp4
    85.1 MB
I have a third video as well of this worm after it died in the dip about an hour later. Its a bit blurry and short but here it is.
 

Attachments

  • Dead Flatworm.mp4
    5.3 MB
I will be introducing a wrasse as soon as possible to potentially help. Still hoping someone may be able it ID these
 
Proving to be quite resilient too.

Dips they've recovered or survived:
Fauna Marin - The Dip
TLF - Revive
Brightwell - Medicoral
Seachem - Iodine
Dr Gs Coral Dip (interceptor alternative)

Warasses small enough to go into a 30g Tank (Pink-Streaked, Possum) are proving hard to find given the current climate. Thinking natural control may be the only option. Could add a Mandarin or small Dragonette in the meantime. Not a huge fan of adding them to such a small tank long term.
 
Are they like this?
 

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