This video originally appeared at Russia Today
Visitors waited in long queues to get inside what is said to be Europe’s largest multi-purpose oceanography centre.
The Moskvarium holds up to 8,000 different species of marine life from across the world, including sharks, seals and stingrays.
Visitors can also see killer whales, beluga whales and dolphins perform in the auditorium.
There is even a zone where visitors can swim with dolphins.