paludarium

thumb|upright=1.3|alt=An aquarium viewed from the front. At the bottom front, dark substrate material is built up high at the left and right sides, and low in the center, and its surface is covered in tiny green plants. Water fills the center of the tank, to about the halfway up the total height of the tank. Many and various larger plants grow above the water, and over the back wall of the aquarium.|A paludarium for housing freshwater fish inside A paludarium is a type of vivarium that incorporates both terrestrial and aquatic elements. Paludaria (or paludariums) usually consist of an enclosed container in which organisms specific to the biome being simulated are kept. They may be maintained for purely aesthetic reasons or for scientific or horticultural purposes. The word 'paludarium' comes from the Latin word 'palus' meaning marsh or swamp and '-arium' which refers to an enclosed container.

Paludaria can range in size from small, easily displayed boxes to biospheres large enough to contain entire trees. A prominent example of a very large paludarium is the tropical rainforest exhibit at the Montreal Biodome.