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Scorpaeniformes - Agonidae

Aspidophoroides olrikii (Arctic Alligatorfish)

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):
Number of Oil Globules (min-max):
Oil Globule Diameter (min-max in mm):
Yolk:
Chorion:
Egg/Embryo Pigment:
Pigment Diagnostics:
Diagnostic Characters:

LARVAE INFORMATION

Hatch Size (min-max in mm SL):
Preanal Length (%SL): 41.2 - 44.3
Flexion Length (in mm SL): ~8 - 9
Length at Transformation (in mm SL): 25
Fin Development Sequence:
Larval Pigment Regions: In each developmental larval stage, pigment is present in the regions listed below
(click for pigment regions)
Yolk-sac:
Preflexion: mouth, crown, nape, cheek, dorsal gut, lateral gut, ventral gut, dorsal finfold, anal finfold, caudal finfold, pectoral fin, dorsal, ventral, mediolateral, caudal,
Flexion: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, dorsal finfold, anal finfold, caudal finfold, pectoral fin, dorsal, ventral, mediolateral, caudal,
Postflexion: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, dorsal finfold, anal finfold, caudal finfold, pectoral fin, dorsal, ventral, mediolateral, caudal,
Juvenile: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, dorsal finfold, anal finfold, caudal finfold, pectoral fin, dorsal, ventral, mediolateral, caudal,
Pigment Diagnostics: Distinguished from Aspidophoroides monopterygius by: pigment on notochord tip and caudal finfold more conspicuous
Diagnostic Characters: One dorsal fin, higher pectoral-fin ray count than Anoplagonus inermis and Aspidophoroides monopterygius


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last updated: August 2019