As if attending an underwater gala, seadragons are adorned with gowns of flowing limbs. These graceful characters belong to a family of fish called Syngnathidae, which also includes seahorses and pipefish. Now, University of California, San Diego, marine biologists Greg Rouse and Nerida Wilson are using genetics to unlock some of the mysteries of this mystical animal. In popular dive spots off the coast of Australia, the duo took tiny snips of tissue from the appendages of seadragons for genetic testing, before releasing the creatures. While seadragons are generally grouped into three species, leafy (shown here), weedy and ribboned, the team s genetic analyses and examinations of body structure have shown the eastern and western populations of weedy seadragons could be divided into two species. They also found the mysterious ribboned seadragon is not related to the leafy and weedy seadragons.