Abstract: A process for preparing, transporting and acclimatizing exotic fish or aquatic plants, employing a tank of rigid plastic material and a transparent plastic foil, includes: prefilling the tank with water to between 50% and 80% of capacity; placing the fish or plants in the tank; purging the tank of air; sealing the tank with the foil; transporting the fish or aquatic plants; leveling the tank; punching two apertures in the foil; introducing water from an aquarium drop-by-drop into the first aperture; removing any excess water from the tank via the second aperture; after an acclimatization period, removing the foil from the tank; and transferring the fish or plants to the aquarium.