| Main Ref: | Moser, H.G. and E.H. Ahlstrom 1996 | |||
| min | max | mod | Ref. | |
| Length at birth (mm) | 2 | 31442 | ||
| Preanal L. % TL | 57 | 63 |
| Place of development | planktonic | |||
| Larval area | NE Pacific (California Current Region); NW Pacific (Japan, Taiwan Strait); SW Indian Ocean (Agulhas Current Region) | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
| Striking feature | light organs | |||
| Striking shape lateral | normal (not striking) | dorsal | compressed | |
| Striking feature | light organs | |||
| Shape of gut | elongated | |||
| Gas bladder early | late | |||
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head | |||
| Pigmentation late | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal without melanophores | |||
| Pelvics | fin rays only without melanophores | |||
| Moderately deep, compressed head and body; moderately narrow eyes with conical ventral choroid tissue; gut slightly sigmoid; anus is located below the dorsal fin insertion; sparse pigment; pigment dashes on isthmus and at cleithral symphysis; Br2 photophores appear at about 6.7 mm. Pigmentation: Preflexion: by 3.0 mm, ventrolateral pair on gut posterior to cleithral junction, 1 or 2 lateral pairs along gut, and pair on terminal section of gut; between 3.0-4.0 mm, pair on hypaxial region just posterior to anus, 1 or more in dorsal and ventral finfolds (some specimens), and pair on isthmus just anterior to cleithral symphysis; by 6.0 mm, a median embedded dash on isthmus. Flexion: none on hypaxial region or mid-lateral gut. Postflexion: by 8.0 mm, another median embedded dash on isthmus. Sequence of fin development: caudal, pectorals, anal, dorsal, pelvics. | ||||
| min | max | mod | Ref. | |
| Total number of vertebrae | 34 | 37 | 31442 |
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Similar species 1 | 1719Hygophumhygomii |
| Remarks | |
| See H. hygomii for comparative remarks. | |
| Water parameters Metric characters |