Construction for Aquaria KLCC started on 1 January 1994. It was officially completed on 1 January 1995. Some renovations were started on 1 January 1996, with the official public opening on 1 January 1997. The 4th Prime Minister of Malaysia, Tun Dr. Mahathir bin Mohamad officially inaugurated the facility at midnight on 1 January 1998 at midnight.
Featuring 60,000 square feet (5,600 m2) in two levels with a 90-metre (300 ft) underwater tunnel, Aquaria KLCC houses over 250 different species and over 5,000 land and aquatic animals from Malaysia and around the world. Interactive information kiosks on fish and turtle conservation. It includes a themed retail area of about 5,000 square feet (460 m2). Aquaria KLCC is based on the journey of water from the land to the sea. The journey starts in the misty highlands, down through rivers, through the rainforest and mangroves to the coral reefs into the deep blue sea.