[citation needed] The Aquarium is divided into four main zones: Plymouth Sound, Eddystone Reef, Atlantic Ocean and Blue Planet.

There are 17 tanks, which are home to approximately 80 species of fish and invertebrates, including local sharks, rays, and octopus.

The 'Ocean Drifters' exhibit was opened in 2009, and includes moon jellies, Japanese sea nettles, and upside-down jellyfish, housed in round tanks to prevent injury.

Biozone showcases the biodiversity found in the world's oceans and displays species such as; the longhorn cowfish, lionfish, giant Pacific octopus and seahorses.

[citation needed] The National Marine Aquarium led a project to sink frigate HMS Scylla in 2004 to create an artificial reef in Whitsand Bay, Cornwall.