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Larvae Information Summary for  Pogonias cromis
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Main Ref: Scotton, L.N., R.E. Smith, N.S. Smith, K.S. Price and D.P. de Sylva 1973
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development planktonic
Larval area Delaware Bay
Yolk-sac ovoid   unpigmented Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Yolk-sac present until about 5-6 mm TL.
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal  
Striking feature none
Shape of gut triangular
Gas bladder   early   late  
Spinal armature   early opercular spines only late  
Pigmentation early
Rows on tail no rows
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on trunk
Pigmentation late
Rows on tail no rows
Other melanophores on tail more than two dorso-ventral clusters or bands
Melanophores on head + trunk melanophores on trunk
Urostyle region   early unpigmented late unpigmented
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent)  
At about 5 mm, 3-4 preopercular spines present; soft dorsal, anal and caudal fins generally differentiated. At about 8 mm, full complement of rays present. Pigmentation: 2 prominent chromatophores lie ventrally, behind vent. Dark chromatophores appear dorsally and on sides and begin to form the 6 black vertical bars that remain until the adult size is reached. When at 15 mm, the young drum is the adult shape and the 6 black bars are very pronounced (Ref. 1184).
  L 1st feeding Ref. Months of presence of larvae    Ref. 
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Luna,Susan M. - 05.12.01
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