Blue sac on sea hare?

[jetson]

I’ve had this sea hare for a few months, and he’s done really well. This morning I noticed a blue sac hanging on him. What is it? Is he likely to recover? I’ve removed him from the display for now, which is a 60 cube.

 

[twentyleagues]

Can you tell if it coming from his mouth? That is where the mouth is. I dont know what it is but it doesnt sound good. Any idea of time frame from this happening? Any major changes in that time frame to or with the tank?

 

[jetson]

Can you tell if it coming from his mouth? That is where the mouth is. I dont know what it is but it doesnt sound good. Any idea of time frame from this happening? Any major changes in that time frame to or with the tank?

It seems to be from his mouth. He was fine yesterday, so had to have been overnight. No changes to the tank at all recently.

 

[twentyleagues]

I am using the way back machine here. I think I may have heard of something like this with them "exuding" their stomachs. I cant seem to find anything in a search though that is of any real use. I dont think its a good thing though. Hopefully @ISpeakForTheSeas is around they may know for sure.