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Larvae Information Summary for  Melanocetus johnsonii
( not available )

Main Ref: Watson, W. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 2.3      
Preanal L. % TL 84 44    
Place of development planktonic
Larval area California Current region
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature none
Striking shape lateral short and/or deep dorsal  
Striking feature none
Shape of gut spherical or gut loop
Gas bladder   early   late  
Spinal armature   early   late  
Pigmentation early
Rows on tail no rows
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Rows on tail no rows
Other melanophores on tail one dorso-ventral cluster or band
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent) without melanophores
Deep-bodied, somewhat globular shape; epidermis slightly to moderately inflated; dorsal fin rays usually 14-15; anal fin rays usually 4; pelvic fins absent; pigment saddle or bar on caudal peduncle after about 3.5 mm becomes confluent with dorsal trunk pigment by about 8 mm. Pigmentation: initially little dorsally, over hindbrain only; dorsal and dorsolateral trunk pigment present by 3.2 mm, spreads caudad to middle of dorsal fin base by about 3.5 mm, to caudal peduncle by 7.8 mm; saddle on caudal peduncle by 3.5-3.8 mm, spreads ventrad to form bar by about 5,1 mm; gill cover moderately pigmented; dorsally and dorsolaterally on gut, spreading ventrad. Juvenile: uniformly pigmented except on fin rays and illicium. Sequence of fin development: illicium and caudal, anal and pectorals, dorsal.
Meristic characters
  max min mod Ref.
Total number of vertebrae 20 20 20 36493
  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
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