Yes this is normal, some of my males do that. I had one that used to do it all the time when i gave him a bath. He'd let himself sink down to the bottom of the sink/ tub and just chill there for a minute or two. sometimes I'd freak out and after 30 secs. or so pull him up to the surface but he was always fine. He'd like to sit under the water holding his breath. Some of his sons I have- they like to do this too from time to time, don't worry if they go under water on their own or put their whole head in the water to drink, when they are done they will surface for air. I'm always surprised how long they choose to hold their breath for when my guys do this! It is wierd -but they choose to do it, they must like the feeling i guess..
Kristen
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4.2 Bearded dragons (Lee,Stumpy,Blackie,Spazz,Lynn,Charlotte)
1 Egyptian Uromastyx (Niles)
(Papa Kunja and Uri have recently passed..we love you)
Thank you for your advice! 