Marine Discoveries

Last updated February 2026

Marine Discoveries is a compact aquarium located on the second floor of the Main Street Arcade in central Cairns, showcasing tropical marine life from the Great Barrier Reef and Far North Queensland waters. The facility features walk-through tunnels, touch pools, and displays of local fish species, sharks, rays, and coral formations in a climate-controlled indoor environment. Its central Lake Street location makes it easily accessible for families exploring Cairns city centre, particularly useful during the wet season or hot afternoons when outdoor activities become less appealing. The aquarium focuses on education about local marine ecosystems, making it both entertaining and informative for visitors wanting to learn about reef life before or after visiting the actual Great Barrier Reef. **What to Bring** Hand sanitiser for after touching the interactive displays. Camera for photos through the tunnel sections. Small backpack as there's limited storage space. **Best Age Range** Best for ages 4-12 years who are fascinated by marine life and enjoy interactive experiences. Toddlers under 3 may find it overwhelming, while teenagers might find it too small unless they have a strong interest in marine biology. **Good to Know** Parking available in nearby Lake Street car parks with short walk required. Air-conditioned throughout making it ideal for hot weather or rainy days. Opens daily but check seasonal hours as they vary. Small venue so allow 45-60 minutes for full visit. **Tips From Other Parents** Visit during weekday mornings when it's quieter and staff have more time to explain exhibits. The touch pools are most active in cooler parts of the day. Combine with other indoor Cairns attractions if weather is poor.