Hi all, a few of my Euphyllia are creating this bubble at the top of the flesh band. Any ideas on what causes this? Sorry for blurry pics lights are off in the photo.
Was it open when the lights were on? If so, this looks normal. Euphyllia can behave differently at night. Some will stay almost fully open all night. Others will partially open. I believe these are all feeding responses. Some Euphyllia can close up and literally look dead at night. It depends on the individual coral and the presence of food. They’ll often open and close throughout the night.
If it wasn’t fully open today, then we should take a look at your parameters.