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Opistognathus darwiniensis, Darwin jawfish
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Opistognathus darwiniensis
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Randall, J.E.
Teleostei (teleosts) >
Ovalentaria/misc
(Various families in series Ovalentaria) >
Opistognathidae
(Jawfishes)
Etymology:
Opistognathus:
Greek, opisthe = behind + Greek, gnathos = jaw (Ref. 45335); to the very elongate upper jaw of the type species of the genus,
Opistognathus nigromarginatus
(Ref.
128653
)
.
More on author:
Macleay
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 1 - 4 m (Ref.
128653
). Tropical
Indo-West Pacific: northern Australia.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 50.0 cm TL male/unsexed; (Ref.
36661
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 10 - 11;
Dorsal
soft rays
(total): 17-18;
Anal
spines
: 2;
Anal
soft rays
: 14 - 15;
Vertebrae
: 30 - 32. This species is distinguished by the following characters: with a rigid upper jaw lacking flexible lamina posteriorly, in adults extending about 0.7-1.2 eye diameters behind posterior margin of orbit; infraorbitals are relatively slender and tubular, the third infraorbital with small sensory canal opening and slender suborbital shelf; D X-XI,17-18, rarely X,18; vertebrae typically 12 + 18 or 19; body with two separate lateral lines, with the ventral one irregularly developed along lower side in region of anal-fin origin, often with one or more branches on belly; head covered with close-set, tiny, brown spots; pelvic and caudal fins usually strongly barred; anterior naris palmate (Ref.
128653
).
Found in shallow reefs, in sand or rubble areas. Mouthbrooders (Ref.
240
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Employ mouthbrooding to care for their young (Ref.
240
).
Smith-Vaniz, W.F.
, 2023. Review of Indo-West Pacific jawfishes (
Opistognathus
: Opistognathidae), with descriptions of 18 new species. Zootaxa 5252(1):1-180. (Ref.
128653
)
IUCN Red List Status (Ref.
130435
)
Not Evaluated
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 25 - 29.2, mean 28 °C (based on 518 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.9 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (40 of 100).
Nutrients (Ref.
124155
): Calcium = 52.9 [29.8, 78.5] mg/100g; Iron = 0.587 [0.378, 0.956] mg/100g; Protein = 18.7 [17.7, 19.6] %; Omega3 = 0.0846 [, ] g/100g; Selenium = 49.9 [27.3, 88.1] μg/100g; VitaminA = 48.8 [17.9, 129.8] μg/100g; Zinc = 1.28 [0.92, 1.75] mg/100g (wet weight);
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