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Larvae Information Summary for  Sebastes melanops
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Main Ref: Moser, H.G. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     4 36715
Preanal L. % TL        
Place of development planktonic
Larval area California Current region
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Extrusion larvae: series along ventral body.
Post larvae
Striking feature duck-billed shape of head
Striking shape lateral normal (not striking) dorsal  
Striking feature duck-billed shape of head
Shape of gut triangular
Gas bladder   early   late  
Spinal armature   early several different spines late several different spines
Pigmentation early
Rows on tail ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail dorsal + ventral + lateral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Pectorals normal covered with melanophores
Pelvics normal (i.e. small or absent) with melanophores
Distinguished from S. flavidus by: high pectoral fin ray count (usually 19); fewer lateral line pores (usually <50); deeper, shorter caudal peduncle; pelagic juveniles have spot on first dorsal fin. Pigmentation: Preflexion: initially, dorsally on gut, about 16 in series on ventral margin of tail (from about postanal myomere 4-6 through 18), and 1 or 2 ventral to notochord in caudal region; by 4.3 mm, gut covered, 1 or more on midbrain, nape, and lower jaw, some coalescence in series on ventral margin of tail (about 9 in series, closer together posteriorly), 1 on dorsum opposite posterior end of ventral tail series, heavy on inner surface of pectoral fin base and on pectoral fin blade; by 5.7 mm, about 8 on dorsum opposite posterior part of ventral tail series. Flexion: more on brain and nape; patches in otic and opercular regions and on trunk above pectoral fin base; heavy on pectoral and pelvic fins; ventral tail series embedded; line on dorsum from middle of dorsal fin base to caudal peduncle; 1 or more on lateral midline at caudal peduncle-hypural region. Postflexion: by 11.0 mm, on snout, upper jaw, postorbital region, more on top of head and on opercle, on dorsum from nape to caudal fin, on ventral margin of caudal peduncle, posteriorly on anal fin base, and on posterior hypural margin; by 16.0 mm, more extensive on dorsal half of head, lateral midline streak extends from hypural region to trunk, increasing on epaxial region of trunk; by end of stage, head covered except lower cheek and ventral regions, heavy on dorsum, body covered above lateral midline (accentuated at myosepta), pale ventrally on body, and series on anal fin base. Pelagic juvenile: head covered, except on cheek; body covered, except on chest and ventral trunk region; heavy on dorsum; first dorsal fin covered with spot at 8th-12th spines; proximally on second dorsal fin. Sequence of fin development: caudal, pectorals, dorsal and anal and pelvics. Also Ref. 34817.
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Luna,Susan M. - 21.02.00
Modified by: Luna,Susan M. - 13.03.01
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