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Old 07/13/2018, 08:51 PM   #1
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Join Date: Aug 2017
Posts: 4
What is this Acan doing?

Hi all, I have this Acan coral that I canít for the life of me get to open. Iíve checked all the parameters and nothing jumps out at me as the reason why it stays closed. Iíve also tried various locations and combinations of lighting and flow. Anyway, Iím not expecting a magic answer on how to make it open, but today I looked at it and though the polyp was closed, itís mouth was wide open. And I mean WIDE. Wider than Iíve ever seen a coral open itís mouth. It seemed to be expelling a trail of brown slime, which Iíve seen many of mycorals do, but never with the mouth this wide open. I attached a picture of it. Is this normal? Might this gaping hole hold a clue as to why it wonít open? Thanks in advance.

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Old 07/14/2018, 01:00 AM   #2
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Location: Montreal, Quebec
Posts: 357
Where did you position it in the tank? Acans tend to prefer lower light levels and do better at the bottom of the tank.

Just keep swimming... Just keep swimming... Just keep swimming swimming swimming. What do we do? We swim swim!
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Old 07/14/2018, 11:27 AM   #3
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Right now itís closer to the middle of the tank. I had it at the bottom out in the open where it got full light for a few days: no luck. I then moved it into the shadows of the rocks so it would get less light: still no luck. I moved it up off the sand bed because when it was all the way at the bottom it kept getting covered in sand by my Melanaurus Wrasse who likes to take mouthfuls of sand and then spit them out.
FYI: light is a Kessil AP700.

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