Biodôme de Montréal was one of my most memorable attractions in Montreal. Basically, it's a zoo with a large saltwater aquarium. There are four ecosystems areas. Tropical Forest, Laurentian Forest, Saint Lawrence Marine Eco-system, and a Polar area divided between the Artic and Antartic.
My favourite were the Antartic and Saint Lawrence Marine Eco-system. I love the fact that I could view these cute little penguins in a replicated Antartic environment. The Saint Lawrence Marine Eco-system is a stunning aquarium which replicates the underwater environment of Gulf of St. Lawrence. I saw cod, striped bass, halibut and salmon. The Tropical Forest section was interesting too, as there were monkeys jumping across trees. Biodôme de Montréal really brought back memories of the Vancouver Zoo in Stanley park when there were monkeys and penguins.