All water parameters are good leather developed what looks like stretch marks then turned into a hole that is growing. I included a night photo is is acting normal.
I used to have a lobophytum that would do this 3-4 times a year. It was as if it was dragging itself, as the piece would always end up blown across to the other side of the tank. The coral always remained healthy though.
Has it been retracting its polyps and staying deflated at all?
I had one the size of two softballs that would do this from time to time. Usually it would bud of a few little ones about this time. Sometimes I would notice a little detritus laying inside of it right before this would happen.
Update hole is now split to the side and you can see where it looks like it wants to turn and go back out to the side. All seems to be ok it has not changed its habits that I can physically see. Otherwise still seems healthy and happy atm I'm not concerned will keep yall updated. Sorry for the sideways photos.
I am new to sw been doin fresh for years. So whenever something diff happens it puts me on alert. Glad to know I might be doing it right everything seems happy! Thanks again to all for the replies and articles.
Dont worry. It is called budding. Where it tears itself and each piece will be a new leather but mini. It will generally do the entire outer edge around the whole thing making more holes as it goes. The pieces will be about an inch by an inch and by the looks of it you may have 5 or 6 new babies coming
Update:
Is still working on budding. There are 2 new splits in various parts of the leather still happy and healthy as ever. Will post some photos when I can get them bad angle at the moment.
Mine started that way about a year ago, 6 months later I had 2, now it's working on making 4. As long as it has extended polyps and isn't staying deflated, all is good.
Another update:
Looks awesome, has gotten about 2 to 2 1/2 inches larger since first hole. Has actually gained a green iridescent color since this process began. Coincidence? I'm not sure. No reproduction yet . Will update as changes occur.