Can someone Help ID this ?

[Omarcrown]

Id guess its a form of rock flower but im honestly not sure, picked it up from a local trying to get rid of it that also didnt know. Scrunches down to 1/4th its size at night

 

[yyff88]

Looks like a Trachyphyllia (open brain coral) to me.
Typically placed on the sandbed, fleshy tissue, single large polyp with a raised center.
Beautiful coral but can be sensitive to sharp rocks and strong flow.

 

[Omarcrown]

Looks like a Trachyphyllia (open brain coral) to me.
Typically placed on the sandbed, fleshy tissue, single large polyp with a raised center.
Beautiful coral but can be sensitive to sharp rocks and strong flow.

Awesome ill start doing research immediately. I happen to get lucky with its placement since day one and its been happy and healthy so I havent touched it in months besides feeding. Its started to fold more but its essentially still the same size so I guess theyre just slow growers ? Eats like a horse.

 

[yyff88]

Yeah, that all sounds pretty normal for Trachys.
They’re definitely slow growers, especially compared to SPS, and they can look like they’re “shrinking” when they fold up more during the day.
As long as the tissue stays full, no receding, and it keeps eating well, it’s usually a good sign. They tend to put energy into tissue health more than visible growth.

 

[Omarcrown]

Yeah, that all sounds pretty normal for Trachys.
They’re definitely slow growers, especially compared to SPS, and they can look like they’re “shrinking” when they fold up more during the day.
As long as the tissue stays full, no receding, and it keeps eating well, it’s usually a good sign. They tend to put energy into tissue health more than visible growth.

Actually i did have something a bit odd happen with it recently that it hasn't done again. It sort of spit up a white goey sack and it then appeared to be splitting and seemed to have a large "cut" running through it. I wish i took pictures but its since healed this "cut" and I have no idea what the white goop was. I thought it was dying but it never looked to be very bothered from this action since it continued to shrink at night and bloom during the daylight cycle so i just let it do its thing and just watched for dying flesh. If you look close you can see its pattern changed at the bottom right area between the newer top pictures and the older bottom one thats where the "cut" happened.

 

[yyff88]

That white stringy or goopy material is actually pretty common with Trachys, especially after feeding. They’ll often expel excess mucus, waste, or partially digested food some time after a meal, and it can definitely look concerning if you haven’t seen it before.
As long as the tissue stays inflated, there’s no ongoing recession, and it continues to respond to food, it’s generally considered normal behavior rather than a problem. In many cases it’s just part of their digestion and cleanup process, not a sign of tissue loss or infection.
Of course, if it were accompanied by continued tissue recession, rapid deflation, or exposed skeleton, that would be a different situation — but on its own, mucus expulsion isn’t unusual for brain corals.

 

[Omarcrown]

That white stringy or goopy material is actually pretty common with Trachys, especially after feeding. They’ll often expel excess mucus, waste, or partially digested food some time after a meal, and it can definitely look concerning if you haven’t seen it before.
As long as the tissue stays inflated, there’s no ongoing recession, and it continues to respond to food, it’s generally considered normal behavior rather than a problem. In many cases it’s just part of their digestion and cleanup process, not a sign of tissue loss or infection.
Of course, if it were accompanied by continued tissue recession, rapid deflation, or exposed skeleton, that would be a different situation — but on its own, mucus expulsion isn’t unusual for brain corals.

Ah okay my instinct was that it was just some sort of repeoduction sack but it didnt make sense seeing it's the only one in the tank. And it usually poops from all its mouths simultaneously and its brown/black in color but this was a single mouth that seemed to have fully split open, almost like a splitting mushroom coral, and then self healed over a week or so back to its original shape with one less mouth and slightly different skin pattern. Definitely looked worrysome but im just happy its okay. I guess normal behavior for these guys is just on a different level lol. If I ever catch it doing it again ill def take more pictures for documenting.