Common, or weedy, seadragons (Phyllopteryx taeniolatus) are iconic fish in their native waters of the Great Southern Reef, the southern coastline of Australia. They are beloved by SCUBA divers and aquarium visitors around the world, endlessly fascinating because of their charming behavior, unique camouflage and fantastic coloration. Now, a team of researchers have used modern genetic sequencing to assess the genetic makeup of common seadragons across their entire range, spanning over 5000 kilometers of often remote Australian coast.