The mouth would be your indicator here. If its mouth is securly closed and tight then its ok still. Prob getting ready to expel waste, however if its mouth is gaping open and has been for a while and is just flopping there then no there is an issue. Expelling its insides is another issue and would be IMO what you should look for next if its mouth is open. If its waste it will be a small clump of stuff that floats out. If its its insides then it will look like spagehetti comming out of it. Hope this helps.