Not sure if this applies here, but will post it as it may.
Do you have any majano or aiptasia in the tank?
I only ask this, as I had some in my old eel tank (zebra moray) and once some started to grow around the eels main "tunnel" it ended up with "blisters" similar to the ones your eel has. They were on the underside of the head, as this is what the eel would rub when going into its "hidey hole".
Do you have any majano or aiptasia in the tank?
I only ask this, as I had some in my old eel tank (zebra moray) and once some started to grow around the eels main "tunnel" it ended up with "blisters" similar to the ones your eel has. They were on the underside of the head, as this is what the eel would rub when going into its "hidey hole".


I’m still unsure what was going on with him, the treatment didn’t seem to do anything for the bubbles on him. The chromis in the main aquarium are doing fine, eating super well, the shrimps are fine and active during feeding, and don’t show signs of distress. Do you think it may not have been a viral or bacterial infection, but maybe a sort of cancer or tumor situation?

