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Opistognathus muscatensis, Robust jawfish : aquarium
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Opistognathus muscatensis
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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
)
;
muscatensis:
Named for the type locality Muscat, Oman.
.
More on author:
Boulenger
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 15 - 50 m (Ref.
9710
), usually 30 - 50 m (Ref.
27115
). Tropical; 18°C - 24°C (Ref.
27115
)
Western Indian Ocean: Durban, South Africa to the Persian Gulf, including Mahé Island, Seychelles (Ref.
5468
). Not in Red Sea (Ref.
84159
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 45.0 cm TL male/unsexed; (Ref.
9710
); common length : 30.0 cm TL male/unsexed; (Ref.
5450
)
Dorsal
spines
(total): 11;
Dorsal
soft rays
(total): 15;
Anal
spines
: 3;
Anal
soft rays
: 15. This species is distinguished by the following characters: short supramaxilla and mostly rigid maxilla with only a slight flexible lamina posteriorly; an ocellated spot on the dorsal fin, between third or fourth and eighth spines followed by two large, irregular, dark blotches that extend onto body, and a blackish streak on cheek bordering upper edge of maxilla; outermost segmented pelvic-fin ray is tightly bound to adjacent ray, with interradial membrane not incised distally or only slightly at tip (vs. interradial membrane deeply incised in all other Indo-Pacific
Opistognathus
(Ref.
81517
). Black spot between 3rd and 8th dorsal fin spines, fin also with 2 large blotches that extend onto body; body and dorsal fin with spots and blotches bordered with pale blue (Ref.
5468
).
This species is occasionally encountered in the fish market and its flesh is reported to be relatively good. It is taken incidentally in bottom trawls and by hook and line at 30-50 m (Ref.
81517
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Smith-Vaniz, W.F.
, 1986. Opisthognathidae. p. 726-727. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref.
5468
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
19 July 2017
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Aquarium: commercial
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 22.4 - 28.3, mean 26 °C (based on 73 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
): 3.8 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Low to moderate vulnerability (35 of 100).
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- 20 July 2016
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