Odd Gig behavior?

[DrDNA]

I have a large green gig, have had it for a few months now. This evening, it is partially deflated and keeps expanding and then will contract really quickly... any ideas what it is doing? The only other time I have seen it do this is when I was prying it off the glass in the QT after cipro treatment when it was new.

[xtlosx]

Has it eaten anything recently? Pictures? Has it reinflated?

[D-Nak]

Sounds like it's trying to purge something. Is its mouth gaping?

[DrDNA]

It's inflated and seems to be acting normal today. Mouth is open some though, maybe a half inch or do. I had fed the tank heavily with mysis and krill a couple days before, so maybe it was purging... Or maybe it ate a wrasse...