Urgent Care :: RES making noise

[Farshad.roger]

hey guys
today i changed the water in my Tank and i put my RES in a box with newspaper inside...after 5-6 hours i went to the box and i saw she went inside her shell and i heard a noise like ssss....i tought she moved the news paper...one more time i went to her again she made the same noise but this time i saw she opened her mouth too...atfer it didnt happened again
she has everything she needs didnt had any problem till today morning ...now she seems ok too
i just got scared abit...what can it be?
i tought it can be something like an reaction of getting scared or defending systems

[marisa]

Yes, that's what it was---RES can hiss if startled and/or scared. They will also produce a hissing sound when they quickly pull their heads into their shells---the hiss is caused by air being expelled from the lungs to make room for the head.

[Shelly5]

My 5 year old RES Shelly Hisses as well when we have her in the tub when we are cleaning her tank shes very unhappy about it and makes it very clear to everyone around there is no reason to worry i was a bit shocked the first few times but now we are getting us to it

Shelly5