I'm actually surprised to tell you the truth. While retics are large, they require no where near the space large monitors do. And i think Kris was breeding water monitors. They get big. I had a Nile Monitor about 30 years ago which i got as a hatchling from a local breeder. He was the most laid back lizard i have seen except when around one particular buddy of mine which he REALLY hated and took a shot at him with his tail. He was about 5 feet at the time and lucky for my buddy, he was quick. The tail put a nice dent/break in the sheet rock wall lol. I ended up having to re home him as he grew beyond my financial abilities being i was an 18 year old kid living on his own in an apartment along with a few geckos, pacman frog and a BP lol. I miss him though and still think about him. He was hands down my favorite pet especially since i got him as a little tiny hatchling who would chase crickets around the cage lol.