Sources suggest that camels do not have gallbladders.
Gallbladder may be absent in mammals which can manage without food and water for a long period of time. And since the size of the gallbladder must be proportional to the size of the liver, the gallbladder may be absent in big mammals (elephants, rhinoceros, whales) because of their anatomical peculiarities.
Camels live in barren deserts, so they have to search for food all the time. They are incredibly adaptive and persevering, capable of walking over 10 hours a day, covering more than 50 kilometers with a load of 250 kilograms on their back in the heat of the desert.
Learn more about camels by checking these 30 most incredible facts shared by Thefactsite.com.