Musée Océanographique The independent visitor guide to the Temple of the Sea

Oceanographic museum and aquarium

Inside the Monaco aquarium: ninety tanks, three marine worlds

The aquarium level of the Oceanographic Museum of Monaco is one of the oldest public aquariums in Europe — and still one of the most carefully run. Seawater, light and temperature are tuned tank by tank so that each habitat behaves like the patch of ocean it copies.

The three great zones

Tropical coral reef aquarium with colourful fish

The Tropical Lagoon

Warm water · Coral reef · Living colour

The tropical zone recreates the shallow, sunlit world of a coral reef. Living coral colonies — among the hardest organisms to keep in captivity — grow here under programmable lighting that mimics the tropical day. Between the branches weave clownfish, surgeonfish, mandarinfish and shy moray eels. Look closely at the anemones: the partnership between clownfish and anemone, each protecting the other, is one of the most elegant arrangements in nature, and you can watch it negotiate itself in real time.

  • Living coral grown on site
  • Clownfish and anemone symbiosis
  • Fluorescent corals under actinic light
  • Stonefish and other masters of camouflage
Shark in the great lagoon tank of a public aquarium

The Shark Lagoon

450 000 litres · Six metres deep · Apex predators

The centrepiece of the aquarium is a lagoon holding roughly 450,000 litres of seawater behind a panoramic acrylic window. Blacktip reef sharks and nurse sharks patrol the volume in slow, deliberate circuits, sharing the space with hawksbill and green sea turtles. Watching a shark from a metre away, you notice what films never show: the constant, graceful motion, the skin like brushed metal, the eye that is unmistakably watching you back. The lagoon also serves a serious purpose — the museum participates in European programmes studying shark behaviour and rehabilitation.

  • Blacktip and nurse sharks
  • Sea turtles in open water
  • Panoramic viewing window
  • Feeding sessions with commentary on selected days
Mediterranean fish in a rocky aquarium habitat

The Mediterranean Tanks

Local sea · Cold light · Ancient community

Many visitors hurry past the Mediterranean tanks on their way to the sharks — a mistake. The sea directly beneath the museum is one of the best-studied bodies of water on the planet, and these tanks show why. Octopus solve problems in full view. Seahorses anchor themselves to imitation seagrass. Grouper, bream and wrasse cruise rockscapes copied from the reefs below the Rock itself. The Mediterranean is small, old and overexploited; the museum has spent decades documenting its decline and its remarkable capacity for recovery when it is given protection.

  • More than 100 Mediterranean species
  • Octopus and cuttlefish
  • Seahorses and pipefish
  • Species from the Posidonia meadows

Beyond the big tanks

Jellyfish gallery

Back-lit cylinders where jellyfish pulse in slow motion — the quietest room in the building and, for many visitors, the most hypnotic.

Touch pool

At selected times, younger visitors can meet starfish and sea urchins under the supervision of the aquarium team.

The turtle care centre

The museum runs a rescue and rehabilitation programme for injured Mediterranean sea turtles, with some residents visible to the public.

Turtle Island terrace

On the rooftop terrace, a landscaped enclosure houses land tortoises alongside one of the finest views on the Riviera.

Photography is generally permitted without flash; the animals thank you for it.