Platycephalus fuscus | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Scorpaeniformes |
Family: | Platycephalidae |
Genus: | Platycephalus |
Species: | P. fuscus |
Binomial name | |
Platycephalus fuscus G. Cuvier, 1829 | |
Synonyms [1] | |
Platycephalus fuscus, the dusky flathead or black flathead, (literally translating from Ancient Greek as "flat-head dusky") is a large predatory fish and the largest member of the family Platycephalidae. [2] [1] Dusky flathead are a largely estuarine species and are found in estuaries, estuarine lakes and coastal bays on the east coast of Australia, from Cairns in Queensland to the Gippsland Lakes in Victoria. They occur over sand, mud, gravel and seagrass and can inhabit estuarine waters up to the tidal limit.
Flathead are notable for their unusual body shape, upon which their hunting strategy is based. Flathead are dorsally compressed, meaning their body is wide but flattened and very low in height. Both eyes are on the top of the flattened head, giving excellent binocular vision in order to attack overhead prey. The effect is somewhat similar to flounder. In contrast to flounder however, flathead are much more elongated, the tail remains vertical, and the mouth is large, wide and symmetrical. Flathead use this body structure to hide in sand (their body colour changes to match their background), with only their eyes visible, and explode upwards and outwards to engulf small fish and prawns as they drift over the hidden flathead.
Dusky Flathead colour varies from sandy with brown spots and blotches to dark brown/black with white spots. They have a distinctive black spot on their caudal fins. Dark bars are often visible across the rear of the body. The preopercular spines on each side of the head are very sharp and slightly venomous, and should be avoided when handling the fish. [3]
Dusky flathead are the largest of the many species of flathead found in Australia, and the most commonly caught. Dusky flathead have very rarely been caught at sizes up to 12–15 kg and lengths up to 1.3 metres, but average size is 0.5–1.5 kg and 40–50 cm. [4] Typically a fish of estuaries and estuarine lakes, dusky flathead are rarely found in other habitats.
The diet of dusky flathead is typically composed of smaller fish and prawns. According to NSW DPI Fisheries research, dusky flathead grow relatively quickly. In fact, dusky flathead can reach 40cm total length after just three years. Female Dusky Flathead mature at around 55cm total length while males mature much earlier at about 22cm total length. Only female fish attain the larger sizes. Breeding is reported to occur in mid to late summer around estuary mouths. [3] A recent study (Pollock 2014) shows that the sex of dusky flathead is determined at the juvenile stage, and that there is no sex inversion from male to female.
Dusky flathead are a popular species for commercial and recreational fishing in eastern Australia. [5] They readily take baits and minnow lures, and on such lures are good fighters. Recently[ when? ] they have proven to be very vulnerable to fishing techniques using jigged soft plastic lures. In the face of heavy fishing pressure and more effective techniques, a largely catch and release approach from anglers is essential nowadays to conserve dusky flathead. Fishermen must release dusky flathead over 70 cm, with the reason that they are important large breeding females.
The hypothesis that dusky flathead over 70 cm are "important large breeding females" is questionable. A study by Pollock (2014) [6] shows that the vast majority of eggs produced by the annual spawning aggregation come from the mid-size females (50 cm–60 cm), but more importantly the large females over 70 cm are often reproductively senescent—that is they have degenerate ovaries in which the eggs are breaking down or have broken down, and are not shed. A study is currently underway in northern New South Wales which is finding at most of the large female flathead (>75 cm) also have degenerate ovaries during the early spawning period (Nov/Dec), whereas the mid-size females have healthy ovaries with developing yolky eggs. [6]
A flathead is one of a number of small to medium fish species with notably flat heads, distributed in membership across various genera of the family Platycephalidae. Many species are found in the Indo-Pacific, especially most parts of Australia where they are popular sport and table fish. They inhabit estuaries and the open ocean. Flathead can grow at least 1 metre (3.3 ft) in length and 18 kilograms (40 lb) in weight, with dusky flathead being the biggest, although fish this size are seldom caught.
The Australian bass is a small- to medium-sized species of primarily freshwater fish found in coastal rivers and streams along the east coast of Australia. A member of the genus Macquaria from the family Percichthyidae, the Australian bass is an important member of the native fish assemblages found in east coast river systems. It is a native predatory fish and an extremely popular game fish species among anglers. The species was simply called perch in most coastal rivers where it was caught until the 1960s, when the name "Australian bass" started to gain popularity.
The crevalle jack, also known as the common jack, black-tailed trevally, couvalli jack, black cavalli, jack crevale, or yellow cavalli is a common species of large marine fish classified within the jack family, Carangidae. The crevalle jack is distributed across the tropical and temperate waters of the Atlantic Ocean, ranging from Nova Scotia, Canada to Uruguay in the western Atlantic and Portugal to Angola in the eastern Atlantic, including the Mediterranean Sea. It is distinguishable from similar species by its deep body, fin colouration and a host of more detailed anatomical features, including fin ray and lateral line scale counts. It is one of the largest fish in the genus Caranx, growing to a maximum known length of 124 cm and a weight of 32 kg, although is rare at lengths greater than 60 cm. The crevalle jack inhabits both inshore and offshore waters to depths of around 350 m, predominantly over reefs, bays, lagoons and occasionally estuaries. Young fish dispersed north by currents in the eastern Atlantic are known to migrate back to more tropical waters before the onset of winter; however, if the fish fail to migrate, mass mortalities occur as the temperature falls below the species' tolerance.
The Old World silversides are a family, Atherinidae, of fish in the order Atheriniformes. Atherinidae are abundant and considered bony fish (teleost) that are widespread globally, living in rivers, estuaries, and coastal waters. They occur worldwide in tropical and temperate waters. About two-thirds of the species are marine, and the remainder live in fresh water. The 74 species are in 13 genera. The genus Craterocephalus is the most diverse with 25 species. Four genera are monotypic.
The yellowbelly flounder is a flatfish of the genus Rhombosolea, found around New Zealand. A different species from the genus Rhombosolea is found in Australia and also goes by the name yellow-belly flounder. The Māori people have commonly fished for R.leporina, and many other species of flatfish, throughout New Zealand's coastal waters for hundreds of years. The Māori name for this species is 'pātiki tōtara'.
The New Zealand sand flounder is a righteye flounder of the genus Rhombosolea, found around New Zealand in shallow waters down to depths of 100 m.
Platycephalus is a genus of mostly marine, demersal ray-finned fish belonging to the family Platycephalidae. They are found in the eastern Mediterranean, the Indian Ocean and western Pacific Ocean.
The King George whiting, also known as the spotted whiting or spotted sillago, is a coastal marine fish of the smelt-whitings family Sillaginidae. The King George whiting is endemic to Australia, inhabiting the south coast of the country from Jurien Bay, Western Australia to Botany Bay, New South Wales in the east. The King George whiting is the only member of the genus Sillaginodes and the largest member of the smelt-whiting family Sillaginidae, growing to a length of 80 cm and 4.8 kg in weight. The species is readily distinguishable from other Australian whitings by its unique pattern of spots, as well as its highly elongate shape. King George whiting are often found in bays and protected waterways over sand and seagrass beds, also venturing out onto deep continental shelf reefs during adulthood. The species is a benthic carnivore, consuming a variety of crustaceans, polychaete worms, molluscs and fish. The King George whiting forms the basis of one of southern Australia's most important commercial fisheries, reportedly worth over five million Australian dollars per year. The species is also heavily targeted by recreational anglers, who value the whiting for its sporting and eating qualities.
The sand whiting, also known as the summer whiting, yellowfin whiting or blue-nose whiting, is a common species of coastal marine fish of the family Sillaginidae, the smelt-whitings. It is a slender, slightly compressed fish that is very similar to other species of Sillago, with detailed spine, ray and lateral line scale counts needed to distinguish the species between its nearest relative Sillago analis. The sand whiting is distributed along the east coast of Australia from Cape York south to Tasmania, as well as Lord Howe Island and New Caledonia in the Pacific Ocean.
The yellowtail trumpeter is a common species of coastal marine fish of the grunter family, Terapontidae. The yellowtail trumpeter is native to Australia and Papua New Guinea, ranging from Cape Leeuwin in Western Australia along the north coast to Bowen, Queensland, and along the southern coast of Papua New Guinea.
The Black bream, also commonly known as the southern black bream, southern bream and blue-nosed bream, is a species of anadromous ray-finned fish of the porgy family Sparidae. A deep-bodied fish, it is occasionally confused with other similar species that occur within its range, but is generally distinguished from these species by a lack of yellow ventral and anal fins. Southern black bream are endemic to the southern coasts of Australia from Shark Bay in Western Australia to Ulladulla, New South Wales, as well as Tasmania.
The European flounder is a flatfish of European coastal waters from the White Sea in the north to the Mediterranean and the Black Sea in the south. It has been introduced into the United States and Canada accidentally through transport in ballast water. It is caught and used for human consumption.
Acanthopagrus australis, the yellowfin bream, also known as sea bream, surf bream, silver bream or eastern black bream, is a species of marine and freshwater fish of the porgy family, Sparidae. It is a deep-bodied fish, occasionally confused with Acanthopagrus butcheri, but is generally distinguished by its yellowish ventral and anal fins. It is a popular target for recreational fishermen due to its capacity to fight well above its weight coupled with its table quality.
Smelt-whiting is the common name for various species of the family Sillaginidae. The Sillaginidae are distributed throughout the Indo-Pacific region, ranging from the west coast of Africa to Japan and Taiwan in the east, as well occupying as a number of small islands including New Caledonia in the Pacific Ocean. Well known members of this family include King George whiting, Japanese whiting, northern whiting, sand whiting and school whiting.
Porgy is the common name in the US for any fish which belongs to the family Sparidae. They are also called bream. Porgies live in shallow temperate marine waters and are bottom-dwelling carnivores. Most species possess grinding, molar-like teeth. They are often good eating fish, particularly the gilt-head bream and the dentex.
Coastal fish, also called inshore fish or neritic fish, inhabit the sea between the shoreline and the edge of the continental shelf. Since the continental shelf is usually less than 200 metres (660 ft) deep, it follows that pelagic coastal fish are generally epipelagic fish, inhabiting the sunlit epipelagic zone. Coastal fish can be contrasted with oceanic fish or offshore fish, which inhabit the deep seas beyond the continental shelves.
Platycephalus speculator, the southern bluespotted flathead, Castelnau's flathead, deepwater flathead, king flathead, Lakes Entrance flathead, longnose flathead, shovelnose flathead, Southern dusky flathead, Southern flathead or yank flathead, is a common species of flathead. This species is endemic to southern Australia.
Platycephalus caeruleopunctatus, the bluespotted flathead, drift flathead, Eastern blue-spot flathead, longnose flathead, red flathead, red spotted flathead, sand flathead or yank, is a species of predatory ray-finned fish belonging to the family Platycephalidae, the flatheads. Bluespotted flathead are a marine species and are predominantly found in offshore waters and coastal bays on the east coast of Australia where they are almost exclusively found on marine sand.
Platycephalus bassensis the Southern sand flathead, Bass flathead, bay flathead, common flathead, sand flathead, sandy, sandy flathead, slimy flathead or yanks, is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. It is endemic to Australia.
Platycephalus endrachtensis, or the bar-tailed flathead, bar-tail flathead, flag-tail flathead, northern sand flathead, northern-flag tailed flathead, sand flathead, western estuary flathead, is a predatory fish in the family Platycephalidae. It is found from the eastern Indian Ocean to the western Pacific, including in Australian and Indonesian waters up to 60 m (200 ft) deep over sand, at temperatures between 17 and 18 °C. The maximum length of the species is 62 cm (24 in), and its weight up to 5 kg (11 lb). A popular angling species, the specific epithet endrachtensis refers to Eendrachtsland, an early Dutch name for Australia, with the suffix -ensis, meaning "place". Venomous spines are hazardous for safe handling.