The humpback red snapper (''Lutjanus gibbus''), the paddletail, paddletail snapper or hunchback snapper, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or h ...

, a snapper belonging to the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Lutjanidae Lutjanidae, or snappers are a family of perciform fish, mainly marine, but with some members inhabiting estuaries, feeding in fresh water. The family includes about 113 species. Some are important food fish. One of the best known is the red snapp ...

. It has a wide

Indo-West Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the ...

distribution. It is a commercially important species, as well as being sought after as a

game fish Game fish, sport fish or quarry refer to popular fish pursued by recreational anglers, and can be freshwater or saltwater fish. Game fish can be eaten after being caught, or released after capture. Some game fish are also targeted commercial ...

. It is also a popular species for display in public aquaria. It has been reported to cause

ciguatera poisoning Ciguatera fish poisoning (CFP), also known simply as ciguatera, is a foodborne illness caused by eating reef fish whose flesh is contaminated with certain toxins. Such individual fish are said to be ciguatoxic. Symptoms may include diarrhea, vom ...

Taxonomy

The Humpback red snapper was first formally described in 1775 as ''Sciaena gibba'' by the

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

speaking

Finnish Finnish may refer to: * Something or someone from, or related to Finland * Culture of Finland * Finnish people or Finns, the primary ethnic group in Finland * Finnish language, the national language of the Finnish people * Finnish cuisine See also ...

born

explorer Exploration refers to the historical practice of discovering remote lands. It is studied by geographers and historians. Two major eras of exploration occurred in human history: one of convergence, and one of divergence. The first, covering most ...

and naturalist Peter Forsskål with the type locality given as the

Red Sea The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; ...

. The specific name, ''gibbus'' means "humpbacked", a reference to high, steep dorsal profile on the head of the adults.

Description

Humpback red snapper has a body which is relatively with a standard length which is 2.2 to 2.5 times its depth, with a head which has a very steeply sloped forehead a well developed known and notch in the preoperculum. The vomerine teeth are arranged in a crescent shaped patch with no rearwards extension and the tongue is smooth, lacking any teeth. The

dorsal fin A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through c ...

has 10 spines and 13-14 soft rays while the anal fin contains 3 spines and 8 soft rays. The rear part of the dorsal and anal fins are pointed in shape. The

pectoral fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as ...

s contain 16 to 17 rays and the

caudal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as ...

is forked with rounded lobes. This fish attains a maximum

total length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish ...

of , although is more typical. The overall colour of this snapper is red or grey, darker on back and upper head. There is an orange tint on the lower part of gill cover and on the axil of the pectoral fin. The fins may be red but the median fins are normally dark brown to blackish with the soft-rayed part of the dorsal fin, the anal fin and the caudal fin having a thin white margin. The juveniles have a sizeable circular black spot at base of caudal fin.

Distribution and habitat

''Lutjanus gibbus'' ha a wide Indo-West Pacific distribution. It ranges from the eastern African coast and the Red Sea to the Society and Line islands and from Australia in the south to southern Japan in the north. It has also been recorded from the

Marquesas The Marquesas Islands (; french: Îles Marquises or ' or '; Marquesan: ' (North Marquesan) and ' (South Marquesan), both meaning "the land of men") are a group of volcanic islands in French Polynesia, an overseas collectivity of France in t ...

and south to

Rapa Iti Rapa, also called Rapa Iti, or "Little Rapa", to distinguish it from Easter Island, whose Polynesian name is Rapa Nui, is the largest and only inhabited island of the Bass Islands in French Polynesia. An older name for the island is Oparo. The ...

. In Australia it is found from

Houtman Abrolhos The Houtman Abrolhos (often called the Abrolhos Islands) is a chain of 122 islands and associated coral reefs, in the Indian Ocean off the west coast of Australia, about west of Geraldton, Western Australia. It is the southernmost true coral ...

to the

Dampier Archipelago The Dampier Archipelago is a group of 42 islands near the town of Dampier in the Pilbara, Western Australia. The archipelago is also made up of reefs, shoals, channels and straits and is the traditional home of five Aboriginal language group ...

and reefs off the northern coast of

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

, the Ashmore Reef in the

Timor Sea The Timor Sea ( id, Laut Timor, pt, Mar de Timor, tet, Tasi Mane or ) is a relatively shallow sea bounded to the north by the island of Timor, to the east by the Arafura Sea, and to the south by Australia. The sea contains a number of reefs ...

the on the eastern coast from the outer

Great Barrier Reef The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over over an area of approximately . The reef is located in the Coral Sea, off the coast of Queensland, ...

and Coral Sea reefs south to

Moreton Bay Moreton Bay is a bay located on the eastern coast of Australia from central Brisbane, Queensland. It is one of Queensland's most important coastal resources. The waters of Moreton Bay are a popular destination for recreational anglers and are ...

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , establishe ...

with juveniles occurring south to Sydney. The humpback red snapper occurs at depths from . It is associated with reefs and during the day gathers in large, mostly stationary aggregations on coral reefs. The juveniles shelter in beds of sea grass in protected areas of Sandy and muddy substrates, while the aggregations are dominated by subadults. The larger adults inhabit deeper waters on coastal slopes.

Biology

The humpback red snapper feeds on fishes and invertebrates, such as

shrimps Shrimp are crustaceans (a form of shellfish) with elongated bodies and a primarily swimming mode of locomotion – most commonly Caridea and Dendrobranchiata of the decapod order, although some crustaceans outside of this order are refer ...

crabs Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ...

lobsters Lobsters are a family (Nephropidae, synonym Homaridae) of marine crustaceans. They have long bodies with muscular tails and live in crevices or burrows on the sea floor. Three of their five pairs of legs have claws, including the first pair, ...

, stomatopods, cephalopods, echinoderms and ophiuroids. Off East Africa most

spawning Spawn is the eggs and sperm released or deposited into water by aquatic animals. As a verb, ''to spawn'' refers to the process of releasing the eggs and sperm, and the act of both sexes is called spawning. Most aquatic animals, except for aquat ...

takes place during the spring and summer. Sexual maturity occurs at two and a half years old and they form spawning aggregations.

Fisheries

The humpback red snapper catch in 2010 was estimated at , of which are unreported. It is an important species for fisheries in Japan. It is taken mostly using handlines, traps,

spearfishing Spearfishing is a method of fishing that involves impaling the fish with a straight pointed object such as a spear, gig or harpoon. It has been deployed in artisanal fishing throughout the world for millennia. Early civilisations were familia ...

, and gill nets. It is a common item in

fish markets A fish market is a marketplace for selling fish and fish products. It can be dedicated to wholesale trade between fishermen and fish merchants, or to the sale of seafood to individual consumers, or to both. Retail fish markets, a type of wet m ...

, normally being sold as fresh fish. In the Pacific part of irs range consumption of this species has been linked to ciguatera poisoning.

References

External links

* {{Taxonbar, from=Q2557037

humpback red snapper The humpback red snapper (''Lutjanus gibbus''), the paddletail, paddletail snapper or hunchback snapper, is a species of marine ray-finned fish, a snapper belonging to the family Lutjanidae. It has a wide Indo-West Pacific distribution. It is a c ...

Marine fish of Northern Australia