These marine fish are called sea dragons, they are related to the seahorse and they are really cute. There are two types of the sea dragon: the leafy and the weedy sea dragons. They normally can be found along the southern and western coasts of Australia.
Leafy Sea Dragon : Named after the dragons of Chinese mythology, Leafy Sea-dragons resemble a piece of drifting seaweed as they float in the seaweed-filled water. Also known as “Australian seahorses” in Australia.
This animal, the Leafy Seadragon, is a Threatened species. They are threatened by collecting for use in Chinese medicine (and by habitat loss). Just one more example of the beautiful natural world exploited by idiotic traditional Chinese cruelty.