Solvin Zankl / Deepsea Viperfish (Chauliodus sloani) specimen from the North Atlantic near the North West of Spain, at a depth of 560-580m.

Solvin Zankl / Ribbon sawtail fish (Idiacanthus fasciola) from Atlantic Ocean, at a depth of 800-1000m.

Solvin Zankl / Loosejaw fish (Malacosteus niger) with a light organ beneath its eye. Deep sea species in Atlantic Ocean off Cape Verde. Captive.

Solvin Zankl / Deep sea hatchetfish (Sternoptyx diaphana) profile. Deep sea species from Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Photophores of Diaphanous hatchetfish (Sternoptyx diaphana), photographed from underneath. Deep sea species from Atlantic Ocean off Cape Verde. Captive.

Solvin Zankl / Scaless black dragonfish (Melanostomias biseriatus) deep sea fish from Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Elongated bristlemouth (Sigmops elongatus), deep sea fish from Ocean off Cape Verde. Captive.

Solvin Zankl / Black dragonfish (Malacosteus niger) deep sea species with a light organ beneath its eye. Atlantic Ocean off Cape Verde. Captive.

Solvin Zankl / Lightfish (Ichthyococcus ovatus) bioluminescent deep sea species, Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Deep sea viperfish (Chauliodus sloani) portrait, from Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Scaleless dragonfish (Bathophilus nigerrimus), deep sea fish from Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Scaleless dragonfish (Bathophilus nigerrimus), deep sea fish, Atlantic Ocean close to Cape Verde Captive.

Solvin Zankl / Elongated bristlemouth fish (Sigmops elongatus) with jaw wide open, deep sea species from Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Viperfish (Chauliodus sloani) specimen from the North Atlantic deep sea.

Solvin Zankl / Hatchetfish (Maurolicus walvisensis) close up of photophores beneath its body, emitting bioluminescent light. This glow, directed downward through light-guides, likely serves as counterillumination vi...

Solvin Zankl / Hatchetfish (Maurolicus walvisensis) ventral view portrait, showing photophores beneath its body, emitting bioluminescent light. This glow, directed downward through light-guides, likely serves as cou...

Solvin Zankl / Deep-sea hatchetfish (Maurolicus walvisensis) portrait, showing bioluminescent organs along the underside of its body. These fish inhabit the mesopelagic zone of the open sea, typically at depths of 1...

Solvin Zankl / Barbeled dragonfish (Astronesthes caulophorus) portrait, showing bioluminescent barbel under its lower jaw and a luminous organ beneath the eye. A series of light organs runs along its lower body, emi...

Solvin Zankl / Pacific hatchetfish (Argyropelecus affinis) portrait exhibiting bioluminescence. It resides in the mesopelagic zone. Observed during RV Sonne, Cruise SO285, South Atlantic's Benguela upwelling re...

Solvin Zankl / Scaly dragonfish (Stomias boa) head portrait, showing distinctive long barbel under the lower jaw, observed during RV Sonne, Cruise SO285, in the South Atlantic, specifically in the Benguela upwelling...

Solvin Zankl / Smalltooth dragonfish (Pachystomias microdon) portrait, showing barbel and bioluminescence. One of the three deep-sea fish capable of producing red light bioluminescence. Pachystomias can produce and...

Solvin Zankl / Barbeled dragonfish (Melanostomias tentaculatus) head portrait, showing barbel and bioluminescence. Inhabiting depths of 30-950m. Observed during RV Sonne, Cruise SO285, in the Atlantic, Benguela upwe...

Solvin Zankl / Barbeled dragonfish (Melanostomias tentaculatus) portrait, showing barbel and bioluminescence, Inhabiting depths of 30-950m. Observed during RV Sonne, Cruise SO285, in the Atlantic, Benguela upwelling...

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.

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