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

David Shale / Close up of head of Scaly dragonfish {Stomias boa} showing lure, from the Mid-Atlantic Ridge, depth 75-0m

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

Charlie Summers / Greenback cutthroat Trout (Oncorhynchus clarkii stomias) making its way upstream during the spawning season, Neota Wilderness Area, Colorado, USA, July.

Charlie Summers / Greenback cut throat trout (Oncorhynchus clarkii stomias) in their spawning stream in the Neota Wilderness area of Colorado, USA, July. Significant in this is are the Visible Implant Elastomer Tags (...

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarkii stomias) under branches of a tree root eroded away by the swift current of their annual spawning stream. Neota Wilderness Area, Colorado, USA, July.

Charlie Summers / A group of Greenback Cutthroat Trout (Oncorhynchus clarksii stomias) huddle together under the safety of a bush root as they rest on their way upstream during their annual spawning run in a Neota Wild...

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarkii stomias) female in digging a redd or nest into which she will deposit her roe. Neota Wilderness, Northern Colorado, USA.

Charlie Summers / Greenback cut throat trout (Oncorhynchus clarkii stomias) Bear Creek, Colorado Wilderness, USA.

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarkii stomias) male hovering over a redd or nest that the female, in the middle had just dug and hollowed out. Neota Wilderness, in North Park, Colorado, U...

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarkii stomias) female fanning her tail whilst digging a redd or nest. Neota Wilderness Area, Colorado, USA. June.

Charlie Summers / Greenback Cutthroat Trout (Oncorhynchus clarkii stomias) in spawning stream, North Park, Neota Wilderness area, Colorado, USA, July.

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarkii stomias) in spawning stream, Neota Wilderness, Colorado, USA. July.

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

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

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarki stomias), Colorado, USA, July.

Charlie Summers / Male Arctic grayling (Thymallus arcticus) displaying to a female, with a small Greenback cutthroat trout (Oncorhynchus clarki stomias) nearby, Colorado, USA, July.

David Shale / Scaly dragonfish {Stomias boa} having swallowed a Lanternfish {Myctophidae} almost as large as itself, from the Mid-Atlantic Ridge

David Shale / Scaly dragonfish {Stomias boa}, from the Mid-Atlantic Ridge, depth 75-0m

David Shale / Scaly dragonfish {Stomias boa}, from the Mid-Atlantic Ridge, depth 75-0m

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

David Shale / Deepsea fish {Stomias boa} showing section of the body with ventral light organs and a gelatinous layer also with light organs, deep sea Atlantic ocean

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

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...

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarkii stomias) swimming with its mouth open. Fish do this to take in more water across their gills hence they derive more oxygen from that water flow. Neota W...

Charlie Summers / Two Greenback cutthroat trout (Oncorhynchus clarkii stomias) in spawning stream prior to continuing upstream. Neota Wilderness Area, Colorado, USA.

Charlie Summers / Two Greenback cutthroat trout (Oncorhynchus clarkii stomias) moving upstream in spawning run, Neota Wilderness Area, Colorado, USA.

Charlie Summers / Greenback cutthroat trout (Oncorhynchus clarkii stomias) gather under an overhanging bank during their annual spawning run in a Neota Wilderness stream. North Park, Colorado, USA. July.

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