Moskvarium, Public aquarium in VDNH complex, Moscow, Russia.

Moskvarium is a public aquarium within the VDNH complex that recreates habitats for freshwater and marine animals from around the world. The facility spreads across multiple zones with numerous tanks where visitors observe fish, sea turtles, sharks, and other ocean creatures.

Construction began in winter 2013 on the site of former greenhouses in VDNH's Plant Growing zone, funded by investors God Nisanov and Zarakh Iliev through OOO Vozrozhdenie VVC. Moskvarium opened on 5 August 2015, after Mayor Sergei Sobyanin and President Vladimir Putin visited the day before. The 53,000 m² complex was built as part of VDNH's restoration and development programme.

The name joins "Moskva" and "oceanarium"; the building stands by the Kosmos pavilion on VDNH's former greenhouse plot. The exhibition is arranged by geography, from Russian fresh and sea waters to South American and African basins and a reef hall, and a touch pool lets visitors handle animals. Staff take part in marine-biology conferences and the floating-university school.

The complex has three zones: the aquarium floor with 80 tanks, the water-show hall seating up to 2,300, and seven dolphin-swimming pools. The aquarium level holds up to 1,200 visitors at once, so arrive early on busy days. Look for the whale-tail canopy over the dark glass entrances on the plaza.

The aquarium's 25,000 m³ of water was made saline with over 700 tonnes of sea salt from the Sea of Japan and the Sea of Okhotsk; about 80 tonnes of salt are added each month to hold the salinity. Forty-seven engineering systems clean the water, completing a full cycle in four hours.