A huge blue whale swims through the open ocean in this underwater photograph. The blue whale is the largest animal ever to live on Earth.
Species: Blue whale, Balaenoptera musculus
Image ID: 03027
The leafy seadragon (Phycodurus eques) is found on the southern and western coasts of Australia. Its extravagent appendages serve only for camoflage, since it has a nearly-invisible dorsal fin that propels it slowly through the water. The leafy sea dragon is the marine emblem of South Australia.
Species: Leafy seadragon, Phycodurus eques
Location: Rapid Bay Jetty, South Australia
Image ID: 39137