Morphology Data of Lycodes diapterus
Identification keys
Main Ref. Stevenson, D.E. and B.A. Sheiko, 2009
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral eel-like
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth

This species is distinguished by the following: with scales covering the nape and the entire postorbital dorsal surface of the head (in adults 15.0 cm SL and larger): it differs from L. beringi in having higher counts of dorsal-fin ray (usually 111 or more), anal-fin ray (usually 100 or more), vertebral (usually 119 or more), and gill raker (usually 15 or more); differs from L. hubbsi in having 19-21 pectoral-fin rays (vs. 20-23), position of the first dorsal-fin

pterygiophore at the sixth or seventh interneural gap (vs. third), and color pattern, for it lacks narrow light bands extending onto dorsal fin and across nape; differs from the 'L. nakamurae group’’ (nakamurae, pectoralis, nishimurai) in having 4 postorbital pores (vs. 1 or 2), the posteriormost without a short tube; lower pectoral-fin lobe rounded, the tips of the rays rounded and the middle rays often branched, fin membrane not incised (vs. pointed, with rays pointed and unbranched, membrane moderately incised); scales often present on base of pectoral fin; light inverted V-shaped bands usually present on body (Ref. 80505).

Ease of Identification

Meristic characteristics of Lycodes diapterus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 13 - 16
on upper limb 1 - 2
total 14 - 18
total 118 - 126


Dorsal fin(s)

Attributes continuous with caudal fin
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 109 - 118
Adipose fin absent

Caudal fin

Attributes pointed; confluent

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 99 - 109

Paired fins

Pectoral Attributes  other (see diagnosis)
Spines     0
Soft-rays   19 - 21
Pelvics Attributes  other (see diagnosis)
Position    thoracic  before origin of D1
Spines     0
Soft-rays   3 - 3
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Garilao, Cristina V.
Modified by Reyes, Rodolfo B.
Comments & Corrections
Sign our Guest Book
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17