Alex Mustard / Leafy seadragon (Phycodurus eques). Wool Bay Jetty, Edithburgh, Yorke Peninsula, South Australia.

Roberto Rinaldi / Weedy seadragon (Phylloperyx taeniolatus) head portrait, Australia

Roberto Rinaldi / Weedy seadragon (Phylloperyx taeniolatus) with diver watching nearby, Australia. Model released

David Shale / Solenosmilia sp and eunicid polychaete and bamboo coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pencil urchin (Cidaroid). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pencil urchin (Cidaroid). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Black coral (Antipatharia) with tendrils extruded to catch prey. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

Solvin Zankl / Black Dragonfish (Malacosteus niger)

David Shale / Deepsea Dragonfish {Eustomias monodactylus} with bioluminescent lure, from between 498 and 805m, Mid-Atlantic Ridge, North Atlantic Ocean

Warwick Sloss / Eggs attached to the underbelly of the male Weedy sea dragon (Phyllopteryx taeniolatus) wild-caught but filmed in captive conditions under licence, from the coast around south Australia

Solvin Zankl / Scaleless black dragonfish (Melanostomias biseriatus) showing lure, Atlantic ocean

David Shale / Deepsea fish {Stomias boa} with lure and light organs, deep sea Atlantic ocean