FishBase |
Main Ref: | Russell, F.S. 1976 |
max | min | mod | Ref. | |
Length at birth (mm) | 4 | 3 | 3.5 | |
Preanal L. % TL | 50.8 | 44.2 |
Place of development | planktonic | |||
Larval area | to be filled | |||
Yolk-sac | elongated pigmented | Ref: | ||
Yolk | unsegmented | Oil globules | one oil globuleposteriorventralpigmented | |
Rows on tail | no rows | |||
Other melanophores on tail | tail partly covered with melanophores | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
During development the pectoral fin enlarges quickly, and there is a postanal ventral row of melanophores. |
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 | no 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 | ventral row | |||
Other melanophores on tail | tail with single melanophore | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
Urostyle region early | pigmented | late | pigmented | |
Peritoneum | covered with melanophores | |||
Pectorals | strikingly large with rows of melanophores | |||
Pelvics | normal (i.e. small or absent) with melanophores | |||
Armature on the head develops at about 7 mm. Radially arranged melanophores along the outer marginal region of the pectorals. |
max | min | mod | Ref. | |
Total number of vertebrae | 39 | 37 | 38 | 263 |
L 1st feeding | Ref. | Months of presence of larvae | ||||
max | Jan | Feb | Mar | Apr | ||
min | May | Jun | Jul | Aug | ||
mod | 4.7 | 41 | Sep | Oct | Nov | Dec |
Water parameters Metric characters |
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