Blue groper

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Blue groper
Achoerodus viridis.jpg
Achoerodus viridis
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Labriformes
Family: Labridae
Tribe: Hypsigenyini
Genus: Achoerodus
T. N. Gill, 1863
Type species
Labrus gouldii
J. Richardson, 1843
Blue Groper's.png
Distributions:
Red = eastern blue groper
Dark blue = western blue groper
Synonyms
  • HeterochoeropsSteindachner, 1866
  • Platychoerops Klunzinger, 1879

Achoerodus is a genus of wrasses collectively known as blue gropers. They are found in the coastal waters of southern Australia and distinguished by the bright blue colouring of the adult males.

Contents

The thick-bodied blue gropers have peg teeth, heavy scales, large tails and thick lips. Juveniles are brown to green brown. Adult females are brown to greenish-yellow. Each scale may have a darker red spot. The adult males have the bright blue colouring that give the fish their name. The blue can range from deep navy to cobalt blue, and there may also be darker or yellow-orange spots or lines around the eyes.

All blue gropers begin life as females. As they mature, they go through an initial phase, in which they may be male or female, before developing their adult colouring and reaching the terminal phase.

Typically you will only find one or two male blue gropers in an area, with a larger number of the female gropers in the same area. Should the dominant male blue groper die, the largest female will grow, change colour and sex, and become the dominant male.

In Australia, certain states like New South Wales have granted protection to this species. It's considered the state fish symbol for the territory and it is illegal to spear blue groper. There is also a limitation on fishing for them with a line. They are extremely inquisitive, and while it is now discouraged to feed them by cutting up urchins, they still will approach divers as if expecting to be fed.

The fish live in a variety of coastal waters, especially exposed reefs.

In 1998, the eastern blue groper was made the state fish emblem of New South Wales. [1]

Biology

Both species are very long lived fish. The western blue groper has been recorded living for as long as 70 years, making it the longest lived wrasse species alongside the foxfish. [2] [3]

Species

The currently recognized species in this genus are: [4]

See also

Related Research Articles

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The western blue groper is a species of wrasse native to coastal waters of southern Australia from the Houtman Abrolhos in Western Australia to west of Melbourne.

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The eastern blue groper is a species of wrasse native to southeastern Australia from Hervey Bay in southern Queensland to Wilsons Promontory in Victoria. They occur in coastal waters, preferring rocky areas at a depth of about 40 m (130 ft). Juveniles inhabit beds of seagrass in estuaries. The diet of this species consists of invertebrates such as various molluscs, crabs, sea urchins, and cunjevoi. This species grows to a length of 100 centimetres as adult males, while females are less than 70 cm (28 in) long. In 1998, the eastern blue groper was made the state fish emblem of New South Wales.

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References

  1. "Symbols & Emblems of NSW". Archived from the original on 27 March 2010. Retrieved 7 March 2010.
  2. Cossington, S.; Hesp, S. A.; Hall, N. G.; Potter, I. C. (2010). "Growth and reproductive biology of the foxfish Bodianus frenchii, a very long-lived and monandric protogynous hermaphroditic labrid". Journal of Fish Biology. 77 (3): 600–626. doi:10.1111/j.1095-8649.2010.02706.x. ISSN   1095-8649.
  3. "(PDF) Biological parameters required for managing Western Blue Groper, Blue Morwong and Yellowtail Flathead. FRDC Project 2004/57". ResearchGate. Archived from the original on 2021-12-24. Retrieved 2025-01-11.
  4. Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Achoerodus". FishBase . August 2013 version.

Sources