I picked up a couple more Melleri today listed as "Long term captives", and are maybe 18 inches and half the weight of my other Melleri, so very young. Not sure the history on them other than that. The one on the left fit an elongated stature, while the one on the right showed a much deeper belly so hopefully I am getting closer to not have all males or all females. They drank a LOT, but otherwise look in pretty good shape. I will likely separate them over the weekend.