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Larvae Information Summary for  Chelidonichthys cuculus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     3.7  
Preanal L. % TL     45.8  
Place of development planktonic
Larval area to be filled
Yolk-sac elongated   pigmented Ref: 37
Yolk unsegmented Oil globules one oil globuleposteriorventralpigmented
Melanophores on the dorsal and ventral marginal fins. Pectoral fin well developed and pigmented.
Post larvae
Striking feature duck-billed shape of head
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature duck-billed shape of head
Shape of gut triangular
Gas bladder   early invisible late invisible
Spinal armature   early several different spines late several different spines
Rows on tail dorsal + ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Peritoneum covered with melanophores
Pectorals strikingly large with rows of melanophores
Pelvics normal (i.e. small or absent) with melanophores
Three spines in the occipital ridge, the central spine being the longest.
  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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