Help- Strange, Sudden Streaking on Secale

[TechnicalFisher]

When I arrived home tonight I noticed that my BC Secale has suddenly developed streaks on its skin that seem to emanate from the polyps . The coral is deep blue with fluorescent green polyps and the streaks match the color of the polyps. This picture shows the streaks- sorry not the greatest but camera isn't cooperating tonight.

Parameters are all in line and Alk is 7.1 (running Triton Core7). Only recent issue in the tank is elevated Tin on last ICP which I've addressed by finding/removing the source and running polyfilter/cuprisorb for the last week or so.

All other corals (many other SPS, Acans and a large hammer) look fine, are all acting normally and polyps are out. Has anyone seen anything like this before or have any idea what could be causing it? Ran a few searches and haven't been able to turn anything up.

 

[Scorpius]

This is odd and I've never seen this before. Tagging along.

 

[Maggie321]

My monti did this when nutrients were low. I skipped a few wc's and it went back to "normal".

 

[ourcoralreef]

Someone just posted something similar

https://www.reef2reef.com/threads/is-this-normal-for-a-monti-cap.483287/

 

[Graffiti Spot]

I don't believe the two are related. The Monti has some bacterial thing going on maybe and the acropora looks like something different, never seen it that I can remember.

 

[TechnicalFisher]

Thanks everyone and agreed @Pedoconfuego, it looks like something different. I've been searching all over and can't find a thing. It's looking the same today and I got another shot from above that shows the streaks well. It's like directional swirls that come from the polyps, all heading in the same general direction.

Everything else in the tank looks 100% normal and even the secale has polyps out and doesn't appear to be bleaching or doing anything else unusual. Appreciate any other guesses/ideas that anyone has. Thanks!

 

[ourcoralreef]

Could it be that the polyps “tube” is growing and its looking more pronounced

 

[afartindolphin]

No idea why but my tricolor valida does this around polyps on its encrusting edge, sometimes more noticeable than others, never over the entire colony though. It is happy and growing. Sorry for bad pics