Currently housed in the Splash Zone exhibit at Monterey Bay Aquarium, the leafy sea dragon is perhaps the most unusual animal on display.
Related to the seahorse, these are found in the rocky reefs off South and Western Australia. As you can see from the photo, they are very effectively camouflaged among the seaweeds and seagrasses.
Sea dragon’s are very cool. They’re apparently almost impossible to see in the wild (due to the aforementioned camouflage) but are spectacular in aquariums. The way they move seems so surreal!