I found this rather alert tortoise at the Denver Aquarium. If anyone knows what kind it is please let me know as I did extensive research and couldn’t come up with a definitive answer. I guess I need to plan another trip to the aquarium to find out. As aquariums go the Denver one in my opinion is mediocre at best. I lived in Atlanta for a while and the Georgia Aquarium is so good it tends to spoil you for all other aquariums. Still, given that Denver is about as far from an ocean as one can get, it merits some value in my book.