Sling-jaw wrasse | |
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male | |
dark female | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Labriformes |
Family: | Labridae |
Genus: | Epibulus |
Species: | E. insidiator |
Binomial name | |
Epibulus insidiator (Pallas, 1770) | |
Synonyms [2] | |
The slingjaw wrasse (Epibulus insidiator) is a species of wrasse from the family Labridae which is native to the tropical waters of the Indo-Pacific where it occurs around coral reefs. This species is of minor importance to local commercial fisheries and can be found in the aquarium trade. Relatively mundane at first glance, this fish is notable for its highly protrusible jaws.
Epibulus insidiator was formally described as Sparus insidiator in 1770 by Peter Simon Pallas. [3] In 1815 Georges Cuvier assigned Sparus insidiator to a now monotypic genus, Epibulus, which now also contains Epibulus brevis , which was described in 2008. E. insidiator is, therefore the type species of the genus Epibulus. [4]
The sling-jaw wrasse's specific name, insidiator, means "ambusher" or "lurker." This name is thought to have been used among early naturalists because this species was believed to feed on terrestrial insects by spitting drops of water from its elongated mouth. [5]
The sling-jaw wrasse's most notable feature is that the mouth of this species is armed with highly protrusible jaws which unfold into a tube which is easily half its head length (see below). [2] The males of this species are greyish-brown with orange on the back, a yellowish transverse bar on the flank and a pale grey head which is marked with a thin black stripe running through the eye. Males also have a rainbow body. The scales of the male's body are edged with darker pigment. The females can be either bright yellow or dark brown while the juveniles are brown with thin white bars on their flanks and white lines radiating out from their eyes. [6] Intermediately patterned individuals which have yellow blotches, a pale tail and sometimes with black pectoral fins do occur. [2] The dorsal fin has 9–10 spines and 9–11 soft rays while the anal fin has 3 spines and 8–9 soft rays. [2] The largest specimens may attain a standard length of 54 centimetres (21 in). [2]
The similar latent sling-jaw wrasse (Epibulus brevis) has a more restricted distribution and is smaller, with duller coloured males, the females have black pigment on their pectoral fins and has longer pectoral fins. [6]
The sling-jaw wrasse possesses the most extreme jaw protrusion found among fishes. The species can extend its jaws up to 65% the length of its head. [7] The speed and length to which the jaw protrudes allows it to capture small fish and crustaceans. The genus this species belongs to possess one unique ligament (vomero-interopercular) and two enlarged ligaments (interoperculo-mandibular and premaxilla-maxilla), which along with a few changes to the form of cranial bones, allow it to achieve extreme jaw protrusion.
The slingjaw wrasse is found in a wide area of the Indo-Pacific region from the eastern coast of Africa, Madagascar and the Red Sea through the Indian Ocean coasts and islands into the Pacific as far east as Johnston Atoll in Hawaii, although vagrants occur in the main Hawaiian chain. It reaches north to Japan and south to New Caledonia. [1] It is found along the northern coasts of Australia from the Houtman Abrolhos archipelago to reefs in the Coral Sea off Queensland. [6]
The slingjaw wrasse is a benthopelagic species which occurs in coral-rich areas of lagoon and seaward reefs, adults are normally found along reef slopes or near drop-offs. They feed on small crustaceans living in the coral and on fishes. [2] It is thought likely that this species is a protogynous hermaphrodite. The colour of the males was observed to become more intense during courtship. Courting males swam with their caudal fin collapsed and held upwards at an angle while the anal fin was folded and stretched downwards. The intensity of the male's colour can return to normal when they feel threatened. Males hold a territory with an area of 500–1,000 square metres (5,400–10,800 sq ft) and a number of females appear to have their home ranges within his territory. Spawning took place around high tide. When spawning the pair were observed to ascend 2–3 metres (6.6–9.8 ft). Spawning seems to be initiated by the females and has been recorded in March, April, May, July, September and October. [1] Another colour change occurs when the wrasse's territory is invaded by an aggregation of grazing Indian sailfin tangs ( Zebrasoma desjardinii ), the wrasse changes colour to mimic the tangs and swims to join the aggregation, hiding amongst the tangs to hunt using similar movements to the grazing tangs. A sling-jaw wrasse mimicking the tangs is difficult to tell apart from the herbivores. [8]
The slingjaw wrasse is collected for food in many parts of its range; it is also collected for the aquarium trade. [6] In Guam in the two decades up to 2008 the average body size of the fish caught did not decline. [1]
The wrasses are a family, Labridae, of marine ray-finned fish, many of which are brightly colored. The family is large and diverse, with over 600 species in 81 genera, which are divided into nine subgroups or tribes. They are typically small, most of them less than 20 cm (7.9 in) long, although the largest, the humphead wrasse, can measure up to 2.5 m (8.2 ft). They are efficient carnivores, feeding on a wide range of small invertebrates. Many smaller wrasses follow the feeding trails of larger fish, picking up invertebrates disturbed by their passing. Juveniles of some representatives of the genera Bodianus, Epibulus, Cirrhilabrus, Oxycheilinus, and Paracheilinus hide among the tentacles of the free-living mushroom corals and Heliofungia actiniformis.
Sparisoma is a genus of parrotfishes native to warmer parts of the Atlantic. FishBase recognizes 15 species in this genus, including S. rocha described from Trindade Island in 2010 and S. choati described from the East Atlantic in 2012. They are the most important grazers of algae in the Caribbean Sea, especially since sea urchins, especially Diadema, the other prominent consumers of algae, have been reduced in many places by a recent epidemic.
The Christmas wrasse, also known as the ladder wrasse, green-barred wrasse or green-blocked wrasse, is a species of ray-finned fish, a wrasse from the family Labridae which is native to the Indian Ocean and the western Pacific Ocean. It inhabits shallow reefs at depths from the surface to 10 m (33 ft). It is of minor importance to local commercial fisheries and can be found in the aquarium trade.
Jansen's wrasse is a species of ray-finned fish, a wrasse from the family Labridae which is native to the Indian Ocean and Pacific Ocean. In the south-western Pacific Ocean it is replaced by sibling species black-barred wrasse. It can be found in the aquarium trade.
The eight-lined wrasse is a species of marine ray-finned fish, a wrasse from the family Labridae, which is native to the Indian and Pacific Oceans. It occurs on coral reefs at depths from 2 to 50 m, preferring to shelter in niches and caves. It can also be found in the aquarium trade.
The six-line wrasse is a species of marine ray-finned fish from the family Labridae which has a wide Indo-Pacific distribution. This species is associated with coral reefs and can be found in the aquarium trade.
The coral hawkfish, the pixy hawkfish or sharp-headed hawkfish, is a species of marine ray-finned fish, a hawkfish belonging to the family Cirrhitidae. It is native to tropical reefs of the Indian Ocean and the Pacific Ocean. It occasionally is found in the aquarium trade.
The surge wrasse, also known as the green-blocked wrasse, purple wrasse or red and green wrasse, is a species of wrasse native to the southeast Atlantic Ocean through the Indian and Pacific Oceans, where it inhabits reefs and rocky coastlines in areas of heavy wave action at depths from the surface to 10 m (33 ft). This species is of minor importance to local commercial fisheries, is popular as a game fish, and can be found in the aquarium trade.
The tubelip wrasse is a species of wrasse native to the Indian Ocean and the western Pacific Ocean. This species occurs in lagoons and on coral reefs at depths from 0 to 20 m. This species grows to 17.5 cm (6.9 in) in total length. It is of minor importance to local commercial fisheries and can be found in the aquarium trade. This species is the only known member of its genus.
Gomphosus caeruleus, the green birdmouth wrasse, is a species of wrasse belonging to the family Labridae. It can be found in the aquarium trade.
Hologymnosus doliatus, commonly called Pastel ringwrasse , is a marine ray-finned fish belonging to the family Labridae, the wrasses, which is found in the Indo-Pacific area.
Pristipomoides multidens, the goldbanded jobfish or goldbanded snapper, is a species of ray-finned fish, a snapper belonging to the family Lutjanidae. It is found in the Indian and Pacific Oceans.
Halichoeres richmondi, commonly called the Richmond's wrasse or chain-lined wrasse, is a fish species in the wrasse family native from the central Indo-Pacific.
Latent sling-jaw wrasse is a species of ray-finned fish from the wrasse Family Labridae which is associated with reefs in the south-western Pacific Ocean.
The blue-throated wrasse, also known as the bluehead, bluehead parrotfish, bluenose, bluenose parrotfish, bluethroat parrotfish, blue-throat wrasse, kelpie, lilac banded parrotfish, rocky bream, rocky cod, rotfish or winter bream, is a species of marine ray-finned fish from the family Labridae, the wrasses. It is found in the Indian and Pacific Ocean off the south-eastern coasts of Australia.
Pictilabrus laticlavius, the patrician wrasse, the senator wrasse, the green parrotfish or the purplebanded wrasse is a species of marine ray-finned fish from the family Labridae, the wrasses. It is found in the eastern Indian Ocean and the south western Pacific Oceans off the temperate coasts of southern Australia.
Pseudocoris heteroptera, the torpedo wrasse or zebra wrasse, is a species of marine ray-finned fish, a wrasse from the family Labridae. It is found in the western Pacific Ocean where it is associated with reefs.
Pseudojuloides cerasinus, the smalltail wrasse or the pencil wrasse, is a species of marine ray-finned fish, a wrasse from the family Labridae. It is found in the tropical Pacific Ocean and was previously considered to have a much wider distribution but the recognition of new species has reduced this wide range.
Pteragogus trispilus is a species of marine ray-finned fish from the wrasse family, the Labridae. It is native to the Red Sea from where it has entered the Mediterranean Sea.
Cirrhilabrus finifenmaa, also known by its common name rose-veiled fairy wrasse, is a rainbow-colored wrasse that is native to the reefs of the Maldives.