He's a juvenile of his kind of whatever they are. I don't remember that part if I ever knew. And as a juvenile he's actually about the size of a camel which is rather bigger than a large dog. When we were "introduced"...I remember I had my back turned to the tent opening (I was unpacking my bag on the cot), felt somebody nudge me on the back, and when I turned around I just about freaked out because of all of Norbert's rather large sharp and many teeth right in my face (!) but luckily he just wanted to be petted.
The guide also told me that Norbert had kind of adopted the tourist group as his own herd. This turned out to be a good thing because the adult versions of Norbert weren't quite as friendly although they were happy to see us...as dinner. I do remember seeing an adult checking us out when we were walking along the river, but I didn't see the entire body...just the rather large head floating alongside, about the size of a mid-size car, and later the large and vicious claws when he reached out to grab some "food" that happened to be walking along the riverbank. I think that, like the hippopotamus, the adult versions of Norbert tend to spend most of the day floating in the water and, then like the Nile crocodiles...they reach out suddenly to snatch their prey whether above, below, or beside the river. But, they do have those rather long and sturdy legs, like the dinosaurs...so I imagine they could still trot right on out of the water if they felt like it...or were hungry enough.
Yeah, this dream had an edge of nightmare about it. But, Norbert was sweet. I'd like to write about him in one of my stories some day. :)