Blue and gold snapper

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Blue and gold snapper
Lutjanus viridis SI.jpg
Blue-and-gold snapper (L. viridis)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Family: Lutjanidae
Genus: Lutjanus
Species:
L. viridis
Binomial name
Lutjanus viridis
(Valenciennes, 1846)
Lutjanus viridis range.png
Synonyms [2]
  • Diacope viridisValenciennes, 1846

The blue-and-gold snapper (Lutjanus viridis) is a species of marine ray-finned fish, a snapper belonging to the family Lutjanidae. It is native to the eastern Pacific Ocean where it is important to local subsistence fisheries.

Contents

Taxonomy

The blue and gold snapper was first formally described in 1846 as Diacope viridis by the French zoologist Achille Valenciennes with the type locality given as the Galápagos Islands. [3] The specific name viridis means "green", Valenciennes described and illustrated this species with a greenish body marked with darker green stripes along the flanks although it is actually bright yellow with bluish-white, black-edged stripes. [4]

Description

Blue-and-gold snapper has an oblong body. The pointed snout [5] has front and rear nostrils which are simple holes. It has a relatively large mouth which has protractile jaws. The teeth are conical to canine like in shape, with the front teeth typically enlarged so that they resemble fangs. The vomerine teeth are arranged in a V-shape with no rearwards extension and there is a patch of teeth at each side of the palate, [6] but there are no teeth on the tongue. The preoperculum has a weakly developed incision and knob. [7] The dorsal fin is continuous, [6] containing 10 spines and 14-15 soft rays while the anal fin has 3 spines and 8 soft rays, [2] the rear of the dorsal and anal fins may be rounded or pointed. The pectoral fins contain 16-17 rays and the caudal fin is truncate or weakly emarginate. [7] This species attains a maximum total length of 30 cm (12 in). [2] The overall colour of this fish is bright yellow on the body, although this can be dark, with five black-margined blue stripes along the flanks. The abdomen is paler and is marked with many thin orange to yellow lines. They frequently show a reddish face. [8]

Distribution and habitat

The blue and gold snapper is found in the eastern Pacific Ocean where it has a rather discontinuous distribution. It occurs at the mouth of the Gulf of California and southern Baja California, and along the western coast of Mexico, from southern Guatemala to Panama and Colombia. It also occurs at the Revillagigedo Islands of Mexico, Clipperton Island, Cocos Island of Costa Rica, Malpelo Island of Columbia and the Galápagos Islands in Ecuador. [1] It is found where there are rocky substrates and coral reefs at depths down to at least 55 m (180 ft). [5]

Biology

The blue and gold snapper occasionally gathers in large daytime aggregations on rocky or coral reefs. In Panama's Gulf of Chriqui this species is restricted to areas where there are madreporite branching corals. [1] At night this species forages for crabs, molluscs, cephalopods, shrimp, and small fish and they normally seek shelter during the day. [5]

Fisheries

The blue and gold snapper is an important target species for subsistence fisheries, they catch it with hooks and lines. [1] The catch is mostly sold as fresh fish. [7]

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References

  1. 1 2 3 4 Rojas, P.; Cotto, A.; Acero, A.; Bessudo, S.; Betancur, R. (2010). "Lutjanus viridis". IUCN Red List of Threatened Species . 2010: e.T183596A8141580. doi: 10.2305/IUCN.UK.2010-3.RLTS.T183596A8141580.en . Retrieved 20 November 2021.
  2. 1 2 3 Froese, Rainer; Pauly, Daniel (eds.). "Lutjanus viridis". FishBase . February 2021 version.
  3. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Lutjanus". Catalog of Fishes . California Academy of Sciences . Retrieved 23 June 2021.
  4. ↑ Christopher Scharpf and Kenneth J. Lazara, eds. (5 January 2021). "Order LUTJANIFORMES: Families HAEMULIDAE and LUTJANIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Archived from the original on 12 April 2021. Retrieved 23 June 2021.
  5. 1 2 3 "Blue and Gold Snapper". Mexican Fish. Retrieved 23 June 2021.
  6. 1 2 "Species: Lutjanus viridis, Blue-and-gold snapper". Shorefishes of the Eastern Pacific online information system. Smithsonian Tropical Research Institute. Retrieved 23 June 2021.
  7. 1 2 3 Gerald R. Allen (1985). FAO species catalogue Vol.6. Snappers of the world An annotated and illustrated catalogue of lutjanid species known to date (PDF). FAO Rome. pp. 122–123. ISBN   92-5-102321-2.
  8. ↑ "Lutjanus viridis". Reef Life Survey. Retrieved 23 June 2021.
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