I have a 40g tall tank. The dimensions are 48" long 12" wide 18" deep. I am looking for different ideas for what to keep in it. I can't guarantee I will have any room for a larger cage. I want something that can happily live it's entire life in this cage. I feel that the 12" wide is too small for a bearded dragon. My house mate insists no snakes larger than a garter. I have two leopard geckos. I have kept leopard geckos, green anoles, crested geckos, toads, dwarf frogs, and red bellied snakes. I have thought about a community tank with anoles or crested geckos. I am curious about what can live in that tank. I am very interested in animals that do not mind being watched. I do not handle much. I am also interested in something that might live for more than just two or three years.