Overview

Distribution

Distribution: Atlantic, Indian, and Pacific Oceans. Branchiostegal rays 10, except Sternoptyx with 6; 3 on epihyal. Branchiostegal photophores 3-7 (mode 6). Branchiostegal pseudobranch present.
  • MASDEA (1997).
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Evolution and Systematics

Functional Adaptations

Functional adaptation

Light used for camouflage: hatchet fish
 

Light emitting organs on the underside of hatchet fish help camouflage them through bioluminescent counterillumination.

         
  "Even in ocean depths where sunlight barely penetrates, the faint  silhouette that a fish throws to predators beneath it in the water  column can make it an easy target. Accordingly, many fish, crustaceans  and squid have developed bioluminescent 'counterillumination' abilities.  Light-emitting organs called photophores line their undersides. These  creatures can adjust the light output of these organs to match the light  their eyes receive from above to help eliminate their shadows. The  hatchetfishis one such species equipped with an underbody  that lights up to camouflage it from hungry eyes below." (Hadhazy 2009)

  Learn more about this functional adaptation.
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© The Biomimicry Institute

Source: AskNature

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records:363
Specimens with Sequences:297
Specimens with Barcodes:294
Species:33
Species With Barcodes:33
Public Records:69
Public Species:21
Public BINs:21
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Barcode data

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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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