Aye its mostly them puffing themselves up.
Have you noticed they can double in size when they are soaking up light from their bulbs?
Quite a few beardies "pancake" in the
bath aswell.
Ruben will always puff himself right out in the
bath. Afterwards he will stay all round for a while whilst he's still nice and warm. The more body surface the more heat they can soak up ^_^
Holly