Let's settle this once and for all: Do camels have one hump or two? There are 2 "species" or types of camel: the dromedary, which has 1 hump, and the bactrian camel, which has 2 humps. Also, camels can go for days without drinking water, but they don't keep extra water in their hump, like people used to think. The hump is just a big lump of fat. Camels aren't friendly -- they spit at you if they get annoyed -- but if you can climb up on one, you can enjoy a nice bumpy ride.