How old are Dr.blowhole ?

I think he's at least 24

maybe in his 30's. cuz In the Movies, Skipper said himself and Kowalski were both in their 20's, so that makes Blowhole older.

He is probly 14 in dolphin years but 24ish in human years

Yeah…about 40…I'd say 35 because he seems around the age of Simon Baker who is 40 and freaking hot but Blowhole seems a bit younger so I'd say 35. :)

Neil Patrick Harris (the voice of Dr Blowhole) is 39 years old.