the world's largest collection of all-Australian aquatic life, with over 12,000 marine animals. Walk underwater and come face to face with dozens of fierce sharks, giant rays, a ferocious 3 metre saltwater crocodile. For the fainter of heart, watch playful seals, a platypus, and adorable penguins. Sydney Aquarium is home to the largest Great Barrier Reef exhibit in the world and interactive touch pools that feel just like being at Sydney's sea-side rock pools.