I looked at my Gulper tank tonight from across the room & saw that one of the Gulpers had a big white thing hanging out of his mouth. I thought to myself "that's odd, I don't have any white feeder fish in there" and moved closer to investigate. Up close it looked like a white balloon hanging out of his mouth!
I thought that he had somehow vomited out his stomach because I have seen Gulpers vomit before. My son snapped a couple of photos with his iPhone. After a few minutes the Gulper started to panic, thrash around, and get very pale. I grabbed the Gulper in my hands and tried to force the white thing back into his mouth, but it wouldn't go in. The Gulper got so pale that his normally black coloured areas had turned almost white.
I started to panic myself. I phoned Charles from Canadian Aquatics because I thought that if anybody knew what I should do it would be him . Charles told me that it was actually his air/swim bladder which was out. Charles knew about it happening with deep water fish but had never heard of it happening in an aquarium before. Charles said that I should put the fish in something tall (like a pvc pipe) with water in it & force the fish down so that the pressure would make the bladder go back in.
While I was talking to Charles the Gulper managed to swallow his swim bladder. He is swimming around normally now and is getting his colour back . I'd say that the poor Gulper had his swim bladder organ out for over 15 minutes.