FishBase
Larvae Information Summary for  Pegasus volitans
( not available )

Main Ref: Reader, S.E. and F.J. Neira 1998
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 1.4      
Preanal L. % TL 69 36    
Place of development planktonic
Larval area Swan Estuary and Cockburn Sound (WA); coastal waters off Sydney (NSW); Northwestern Pacific (Japan)
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail ventral row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Post larvae
Striking feature other
Striking shape lateral short and/or deep dorsal other
Striking feature other
Shape of gut spherical or gut loop
Gas bladder   early   late  
Spinal armature   early   late  
Pigmentation early
Rows on tail ventral row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail dorsal + ventral + lateral row
Other melanophores on tail tail completely covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum covered with melanophores
Pectorals strikingly large with few scattered melanophores
Pelvics fin rays only  
Body width between pectoral fin-bases 25-40%; 12 tail rings. Sequence of fin development: pectoral (1.4-3.8 mm); dorsal (2.8-3.8 mm); anal (2.8-3.8 mm); pelvic (2.8-> 6.7 mm); caudal 3.4-4.2 mm). Body elongate to moderate, initially round in cross-section, much wider than deep by postflexion stage. Head moderate to large, initially round, dorsoventrally flattened by flexion stage. Mouth small, terminal in preflexion larvae, subterminal in postflexion larvae. Gill opening small and located at dorsal margin of pectoral fin base in preflexion larvae and flexion larvae, extending along entire pectoral fin base in postflexion larvae. Gut moderate to long, coiled. Pectoral fin large and fan-shaped in postflexion larvae. One pelvic fin ray during flexion stage, elongate and segmented; second ray from 6.7 mm, shorter than first and unsegmented. Dermal bony plates present by 2 mm, with a single, median dorsal ridge and pointed ridges above and below eye; sharp bony ridges over head, trunk and tail during flexion stage, fully ossified by early postflexion stage.
Meristic characters
  max min mod Ref.
Total number of myomeres 20 19   33989
Preanal number of myomeres 8 7   33989
  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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