Johnius
pacificus
Hardenberg, 1941
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Family:
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Sciaenidae
(Drums or croakers)
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Google Image (not verified)
May show another species!
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Order:
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Perciformes
(perch-likes)
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Class:
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Actinopterygii (ray-finned fishes)
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In this site name:
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Pacific croaker |
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Max. size:
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14.0 cm SL (male/unsexed; Ref. 9772) |
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Environment: |
benthopelagic; freshwater; brackish; marine
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Climate: |
tropical |
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Importance:
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fisheries: of no interest |
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Resilience: |
High, minimum population doubling time less than 15 months(Preliminary K or Fecundity.)
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Distribution:
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Western Central Pacific: northern (=Pacific) coasts of New Guinea.
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Morphology:
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Dorsal
spines
(total): 11 - 11;
Dorsal
soft rays
(total): 25 - 29;
Anal
spines: 2;
Anal
soft rays: 7. Eye small, 11 to 16 % of head length; snout bluntly rounded; no barbel on chin; teeth differentiated into large and small in both jaws; gill rakers slender, about half the length of gill filaments at angle of arch, 10 to 13 on lower limb. Second anal spine long, stiff, 45 to 54 % of head length. Scales on head and throat cycloid (smooth). Swim bladder hammer-shaped, with about 12 pairs of arborescent appendages along its sides, the first entering head and sending a palmate branch to the front of the pectoral arch. Sagitta (large earstone) with a tadpole-shaped impression, the head of which has its long axis lying obliquely to that of sagitta and the tail expanded and deepened as a hallow cone connected with the head by a narrow groove.
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Biology: |
Inhabits estuaries and rivers (Ref. 9772).
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Red List Status: |
Not in IUCN Red List (Ref. 57073)
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Dangerous:
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harmless
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Coordinator: |
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