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Scorpaeniformes - Psychrolutidae

Psychrolutes paradoxus (Tadpole Sculpin)

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): 1.39 - 1.4
Number of Oil Globules (min-max):
Oil Globule Diameter (min-max in mm):
Yolk: Homogeneous
Chorion:
Egg/Embryo Pigment:
Pigment Diagnostics:
Diagnostic Characters:

LARVAE INFORMATION

Hatch Size (min-max in mm SL): 6 - 7
Preanal Length (%SL):
Flexion Length (in mm SL):
Length at Transformation (in mm SL): ~13 - 14
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: yolk, mouth, crown, nape, cheek, dorsal gut, lateral gut, ventral gut, pectoral fin, dorsal, ventral, mediolateral,
Preflexion: mouth, crown, nape, cheek, dorsal gut, lateral gut, ventral gut, pectoral fin, dorsal, ventral, mediolateral, caudal,
Flexion: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, pectoral fin, dorsal, ventral, mediolateral,
Postflexion: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, pectoral fin, dorsal, ventral, mediolateral,
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: Large pigmented pectoral fins. Distinguished from Psychrolutes sigalutes by: more lateral pigment on head and body with development
Diagnostic Characters: Tadpole shape, large head, outer layer of loose, flabby skin; large pigmented pectoral fins, no head or preopercular spines. Distinguished from Psychrolutes sigalutes by: more lateral pigment on head and body with development, pectoral-fin ray count (19-23)


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last updated: August 2019