I am not saying to go for it, but I have read that you can put different species of animals in the same tank if they would be found in the natural world living in close quarters or in the same environment. What kind of diet does the skink have, I have never cared for a skink and am not familiar with their diet. If he eats meat it is probably not a good idea to cohabitate them. Please do some research on the animals and possible illnesses that can be passed to each other or if they can become stressed form each others presence. I am sure others will chime in on this as well. Personally, I think the tank is big enough to house different species so long as they are compatible. I do know that in order to house different species of animals, they need to have a LARGE enclosure and need to exist in different niches with in the tank or enclosure.![]()