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Atheriniformes - Atherinidae

Atherinopsis californiensis (Jacksmelt)

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): 1.89 - 2.5
Number of Oil Globules (min-max): 1-44
Oil Globule Diameter (min-max in mm): 0.03 - 0.6
Yolk: Yellow-orange, granular
Chorion: 13-19 filaments scattered on surface
Egg/Embryo Pigment: head, gut, dorsal,
Pigment Diagnostics:
Diagnostic Characters: Many (23-44) oil globules which coalesce to one or few, narrow perivitelline space, 1-2 cm filaments

LARVAE INFORMATION

Hatch Size (min-max in mm SL): 7.5 - 8.6
Preanal Length (%SL): <50
Flexion Length (in mm SL): 8.8 - < or equal to 11.5
Length at Transformation (in mm SL): 18.1 - 19.5
Fin Development Sequence: Caudal, pectorals, anal rays and 2nd dorsal, pelvics, 1st dorsal and anal spines
Larval Pigment Regions: In each developmental larval stage, pigment is present in the regions listed below
(click for pigment regions)
Yolk-sac: crown, nape, dorsal gut, dorsal, mediolateral,
Preflexion: crown, nape, dorsal gut, dorsal, mediolateral,
Flexion: mouth, crown, nape, dorsal gut, ventral gut, dorsal, mediolateral,
Postflexion: mouth, crown, cheek, dorsal gut, lateral gut, caudal finfold, dorsal, ventral, mediolateral, caudal,
Juvenile:
Pigment Diagnostics: Distinguished from Atherinopsis affinis by: first 5-6 postanal myomeres always lack ventral and mediolateral pigment through larval and early juvenile stages, no postanal ventral melanophores until midflexion, mediolateral pigment originates further posterior
Diagnostic Characters: See pigment diagnostics


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last updated: August 2019