Bob Arthur is the head keeper at Prehistoric Park. He is played by Rod Arthur. He is depicted as a crusty, suffering, often complaining older man, who is loyal to Nigel, but also tends to be cantankerous about the number of prehistoric animals Nigel brings to the Park since the park's staff is overwhelmed throughout the show.
In the Park
Bob Arthur is in charge of feeding, cleaning and controlling the animals in the park. He is the one who usually tidies up. Bob has long suffered from his job, from dealing with the troublesome Titanosaurs to being attacked by a Troodon. However, Bob does have some good sides to his job, such as having his own two baby Ornithomimus, jousting with the Park's teenage Triceratops and being the head park keeper at the Ultimate Wildlife Sanctuary. Bob's favorite Carboniferous animal in the Prehistoric Park is the Arthropleura, as "He's more like a proper animal than some creepy-crawly little spider".