the tank is 16" wide, 18" tall, 44.5" long (55 gallon). the tank has two sliding glass doors in front and a screen mesh top with a nice lighting system on top. the bottom 5 inches can hold water. the inside of the tank has land on both sides and a pond in the middle with a land bridge connnecting the two sides. also comes with a small water heater, and a filter hooked up to a streaming waterfall. also comes with a few species of reptile safe plants and vines hanging from the roof. right now the pond has a LOT of guppies, i don't know how many there are as they bred the whole time i had the vivarium set up but got picked off by the skinks every once in a while. selling only the tank and everything in it as well as the black lighting on top. please pm me with any questions.