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Stomiiformes - Stomiidae

Chauliodus macouni (Pacific Viperfish)

Illustration Meristics Life History ELH Descr. Distribution Footnotes
More information for this taxon at: LarvalBase | FishBase | Univ. Washington Data

EGG INFORMATION

Egg Diameter (min-max in mm): 2.69 - 3.17
Number of Oil Globules (min-max):
Oil Globule Diameter (min-max in mm):
Yolk: Segmented
Chorion: Smooth, clear
Egg/Embryo Pigment: none,
Pigment Diagnostics:
Diagnostic Characters: Wide perivitelline space (0.5 mm), yolk segmented, large egg size

LARVAE INFORMATION

Hatch Size (min-max in mm SL): 6 - 7
Preanal Length (%SL): >75; long
Flexion Length (in mm SL): >15 mm
Length at Transformation (in mm SL): Adult at ~35 - 46
Fin Development Sequence: Dorsal, anal, and pelvics form late in postflexion larvae in adult position
Larval Pigment Regions: In each developmental larval stage, pigment is present in the regions listed below
(click for pigment regions)
Yolk-sac: none,
Preflexion: none,
Flexion: none,
Postflexion: none,
Juvenile: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, dorsal, ventral, mediolateral, caudal,
Pigment Diagnostics: Pigmentation lacking before juvenile stage
Diagnostic Characters: Small head, elliptical eyes, long gut, slender body, median finfold shape, lack of pigmentation, slightly trailing gut


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last updated: June 2021