Introduction to Osaka Aquarium: Osaka Aquarium is one of the largest aquariums in the world. It is famous for its huge whale sharks and has a collection of nearly 620 species of more than 30,000 marine creatures. It is a great family trip Popular attractions. Visitors can first take the elevator to the highest 8th floor and tour from top to bottom. Unlike other aquariums, there are no whale or dolphin performances in the aquarium, but there are special penguin walks in winter.