The oceans off Australia—the world's largest island—are home to thousands of marine fish species.
This bright orange sea star can be found in waters near Sydney, Victoria, South Australia, Western Australia and Tasmania.
During jellyfish season, snorkelers diving near Australia's Great Barrier Reef are advised to wear brightly colored, protective "stinger suits."
Made popular by the acclaimed animated film Finding Nemo, this species of fish typically lives in shallow waters in the Indian Ocean, Red Sea and western Pacific Ocean.
Onespot Foxface Rabbitfish
This fish with a funny name is a popular addition to at-home saltwater aquariums.
These delicate sea creatures are not like most fish. Seahorse couples mate for life, and the males carry the unborn young.
This stingray may seem to have a smile on its face—but don't be fooled! These shallow-water carnivores produce a venom that can be fatal to humans.
It's said that these distinctive swimmers got their name from the Moors of Africa, who believed these fish were bringers of happiness.
At the Sydney Aquarium, visitors can stop by Shark HQ to see the hatchery, one of the world's largest collections of these ocean predators and never-before-seen Great White Shark and Bull Shark tracking.
Six of the seven sea turtle species in the world are found on the Great Barrier Reef.
Also known as a Turkeyfish or Firefish, this beautiful sea creature packs a punch. Its potent venom can cause divers to experience intense pain.
Don't look up! Walk through the aquarium's viewing tunnels to get up-close with some of Mother Nature's wonders. More from Oprah's Ultimate Australian Adventure