The London Aquarium is located in County Hall on the South Bank of the River Thames in central London, near the London Eye. The aquaruim claims a milion visitors a year view its displays.
It is a collection of water tanks showing around 350 species of fish. The aquarium includes three floors and 14 different zones (freshwater stream, Atlantic upper, rivers and ponds, Pacific upper, Indian Ocean, Atlantic lower, touch pool, temperate waters, Pacific lower, coral reef, invertebrates, tropical freshwater, mangrove and rainforest).
London Aquarium website