Posted: Wed Nov 21, 2007 2:48 pm
I can't remember ever seeing actual hiccups, but they will open and close their mouths under water. They could do it to drink, to let some air out of their lungs, or if they're going to eat something, for example.
If I were a turtle, I don't think I'd appreciate it having a big creature staring at me for half an hour. If he's otherwise fine like you say, I wouldn't worry about it.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-