Pacific hatchet fish
| Argyropelecus affinis Garman, 1899 | ||||
| Family: | Sternoptychidae (Marine hatchetfishes) |
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| Order: | Stomiiformes | |||
| Class: | Teleostei | |||
| English name: | Pacific hatchet fish | |||
| Distribution: | Eastern Atlantic: occasionally between Azores and Madeira (Ref. 4739), also from Senegal to Gulf of Guinea. Western Atlantic: 30°N-30°S, including the Gulf of Mexico (Ref. 27768). Northwest Atlantic: Canada (Ref. 5951). Indian Ocean: 20°N-20°S. Eastern Pacific: 35°N-35°S. Western Pacific: 30°N-10°S. South China Sea (Ref.74511). | |||
| Adult biology: | An oceanic and mesopelagic species (Ref. 4739, 58302), mainly at 300-650 m (Ref. 4054), 170-500 m at night and 350-600 m during day (Ref. 58302), commonly 1-600m (Ref. 035838). May make short diel migrations (Ref. 4739). Smaller individuals feed on copepods and ostracods; larger ones feed on euphausiids, salps and chaetognaths (Ref. 4739). Adult complement of photophores acquired at about 14 mm SL (Ref. 4739). Oviparous, with planktonic eggs and larvae (Ref. 35838). | |||
| Diagnosis: | At 5 mm the first light organ appears on the preoperculum. Internal pigment at last 1-10 myomeres; short preanal length; photophores in AN and SC groups widely spaced. Pigmentation: Preflexion-postflexion: internally on notochord at last myomere, extending as far forward as last 5-10 myomeres in some. Transformation: over gas bladder; around stomach; on frontals between eyes; subsequently increasing over fore- and midbrain, on opercular area, on gut; lateral midline series begins at about 13-16 mm; internal caudal peduncle pigment condenses to one blotch. Sequence of fin development: caudal, anal and pectorals, dorsal, pelvics.. See also LARVAE table. | |||
| Climate Zone: | deep-water; 45°N - 45°S | |||
| Main Ref: | Watson, W.. 1996. (Ref. 35838) | |||
| More information: | Collaborators | Common names | Countries | Eggs | FAO areas | Larvae | Pictures | References | Reproduction | Spawning | Synonyms | | |||
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| Modified by: Luna, Susan M. |
Entered by: Froese, Rainer |
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