Jorge, how is it looking this morning? I feel several of us along with you are concerned about your LTA. If it still has its mouth agape is there any way to separate the paired Amphiprion Clarkii clowns from it even if you can just place the LTA in a plastic colander to float at the surface to see if its mouth will close?
Concerns I personally have after being introduced for a week or longer and one or more of the following signs seen, could (not always) be a problem for longevity.
*The anemone is expelling a long and stringy brown substance could be poop your anemone is expelling some of its zooxanthellae. This could be a serious concern.
* The anemone seems to shrink and expand a lot. Anemones will deflate and then re-inflate as a way of changing the water inside of them flushing out wastes. If this is continually happening or if it remains shrunk for longer periods of time, your anemone might be having health problems. stressed or both.
* The mouth is open when it is not eating or expelling wastes.
* When an anemone moves into the rocks and hides from sight or upside down it might be avoiding hosting as anemones decide if it will be the one allowing the hosting. It appears as though there is only 1/2 the symbiotic relationship occurring and it is from the clowns. Clowns not only place food in the anemone, they also groom them (snipping off dead ends of tentacles and such) and I'm worried about what they are doing in the base of the LTA.
* The anemone will not attach its self anywhere in the tank.
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I agree with the fellow member that as long as it is not mushy that is is alive. But I would also have a fine net or leg of a pantyhose to collect as much as possible if the worse case did happen, and I honestly hope it can bounce back.