Leafy seadragons (Phycodurus eques)

Leafy seadragons are closely related to seahorses. They are endemic to the waters off south and east Australia.

The leafy seadragon is an excellent example of an animal camouflaging as a plant to escape predation. The fish has leaf-shaped protrusions all over its body, helping it blend in with the kelp and seaweed around it. 

Their bodies are usually yellow or brown, while the leafy protrusions have an olive tint. To further sell the disguise, the fins of the leafy seadragon are so thin and almost transparent.