Norbert Wu / Black Sea Dragon (Idiacanthus antrostomus) cleared and stained to show bone in red and cartilage in blue, deep sea

Norbert Wu / Black Sea Dragon (Idiacanthus antrostomus) fishing lure in front of mouth attracts prey, deep sea

Solvin Zankl / Threadfin dragonfish (Echiostoma barbatum) portrait, showing a short bioluminescent barbel present beneath the lower jaw and a large triangular luminous organ positioned under the eye. A row of light...

Solvin Zankl / Barbeled dragonfish (Astronesthes caulophorus) close up profile, Benguela Current, Atlantic Ocean, close to Namibia. Controlled Conditions.

Solvin Zankl / Barbeled dragonfish (Astronesthes caulophorus) motionless in the darkness, Benguela Current, Atlantic Ocean, close to Namibia. Controlled Conditions.

Solvin Zankl / Threadfin dragonfish (Echiostoma barbatum) close up panning shot from bioluminescent barbel to the head, Benguela Current, Atlantic Ocean, close to Namibia. Controlled Conditions.

Solvin Zankl / Threadfin dragonfish (Echiostoma barbatum) close up, showing large teeth and triangular luminous organ positioned under the eye, Benguela Current, Atlantic Ocean, close to Namibia. Controlled Conditio...

Solvin Zankl / Threadfin dragonfish (Echiostoma barbatum) close up of bioluminescent barbel found beneath the lower jaw, Benguela Current, Atlantic Ocean, close to Namibia. Lives at depths of over 2,000 meters. Cont...

Solvin Zankl / Threadfin dragonfish (Echiostoma barbatum) motionless, showing large teeth and bioluminescent barbel beneath the lower jaw, Benguela Current, Atlantic Ocean, close to Namibia. Found at depths of over...

Solvin Zankl / Scaleless black dragonfish (Melanostomias biseriatus) appearing out of the darkness and swimming towards the camera, Atlantic Ocean close to Cape Verde.

Solvin Zankl / Portrait of Scaleless black dragonfish (Melanostomias biseriatus), Atlantic Ocean close to Cape Verde.