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Thoracocharax securis (Worclaw zoo)-1.JPG
Thoracocharax securis
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Gasteropelecidae
Fowler, 1907

Thoracocharax is a genus of freshwater hatchetfishes found in the Amazon, Orinoco and Paraná basins in South America. These fish live just under the surface of the water.

Freshwater hatchetfish family of fishes

The freshwater hatchetfishes are a family, Gasteropelecidae, of ray-finned fish from South and Central America. The common hatchetfish is the most popular member among fish keeping hobbyists. The family includes three genera: Carnegiella, Gasteropelecus, and Thoracocharax.

Orinoco river in South America

The Orinoco River is one of the longest rivers in South America at 2,140 kilometres (1,330 mi). Its drainage basin, sometimes known as the Orinoquia, covers 880,000 square kilometres (340,000 sq mi), with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the world by discharge volume of water. The Orinoco River and its tributaries are the major transportation system for eastern and interior Venezuela and the llanos of Colombia. The environment in the Orinoco's basin is extremely diverse; it hosts a wide variety of flora and fauna.

Paraná River river in South America

The Paraná River is a river in south Central South America, running through Brazil, Paraguay, and Argentina for some 4,880 kilometres (3,030 mi). It is second in length only to the Amazon River among South American rivers. The name Paraná is an abbreviation of the phrase "para rehe onáva", which comes from the Tupi language and means "like the sea". It merges first with the Paraguay River and then farther downstream with the Uruguay River to form the Río de la Plata and empties into the Atlantic Ocean.


FishBase recognizes two species in the genus Thoracocharax: [1]

FishBase is a global species database of fish species. It is the largest and most extensively accessed online database on adult finfish on the web. Over time it has "evolved into a dynamic and versatile ecological tool" that is widely cited in scholarly publications.

<i>Thoracocharax securis</i> species of fish

Thoracocharax securis, the giant hatchetfish, is a hatchetfish found in the Amazon River Basin. Adults will grow up to 6.8 cm in the wild and 9 cm in the aquarium. It is a rarely seen species in the aquarium hobby. It is known to glide up to 2.74 meters (9 ft) out of the water.

Rudolf Kner Austrian zoologist and ichthyologist

Rudolf Kner was an Austrian zoologist and ichthyologist.

Related Research Articles

Marine hatchetfish subfamily of fishes

Marine hatchetfishes or deep-sea hatchetfishes are small deep-sea mesopelagic ray-finned fish of the stomiiform subfamily Sternoptychinae. They should not be confused with the freshwater hatchetfishes, which are not particularly closely related Teleostei in the characiform family Gasteropelecidae.

Sternoptychidae family of fishes

The marine hatchetfishes or deep-sea hatchetfishes as well as the related bottlelights, pearlsides and constellationfishes are small deep-sea ray-finned fish of the stomiiform family Sternoptychidae. They are not closely related to and should not be confused with the freshwater hatchetfishes, which are teleosts in the characiform family Gasteropelecidae. The Sternoptychidae have 10 genera and about 70 species altogether.

<i>Argyropelecus</i> genus of fishes

Argyropelecus is an oceanic ray-finned fish genus which belongs in the family Sternoptychidae. A collective name is "silver hatchetfishes", but this can also refer to a species of the freshwater hatchetfishes which are not particularly closely related but merely convergent. The large pupils of these marine hatchetfishes enable them to see dim objects in the deep sea, where light barely penetrates.

<i>Polyipnus</i> genus of fishes

Polyipnus is a genus of oceanic ray-finned fish in the family Sternoptychidae. This is the largest genus of the marine hatchetfishes subfamily Sternoptychinae and indeed of the entire Sternoptychidae. It is not quite as apomorphic as their relatives; it may be that the genus is actually a paraphyletic assemblage of less advanced Sternoptychinae and would need to be split.

<i>Sternoptyx</i> genus of fishes

Sternoptyx is an oceanic ray-finned fish genus which belongs in the family Sternoptychidae. This is the type genus of the Sternoptychidae, as well as the marine hatchetfish subfamily Sternoptychinae.

Sweeper family of small tropical fish

Sweepers are small, tropical marine perciform fish of the family Pempheridae. Found in the western Atlantic Ocean and Indo-Pacific region, the family contains about 26 species in two genera. One species is the target of subsistence fisheries in Japan, where the fish is much enjoyed for its taste. Sweepers are occasionally kept in marine aquaria.

Common hatchetfish species of fish

The common hatchetfish or river hatchetfish is a tropical fish belonging to the freshwater hatchetfish family (Gasteropelecidae). Originating in South America in the Peruvian and middle Amazon, the Guianas and Venezuela, it grows to about 2.5 inches (6.5 cm). The fish gets its name from its relatively large protruding belly which resembles a hatchet. Hatchetfish will often jump out of the water when alarmed, propelled by their large, winglike pectoral fins. They also jump to catch small aerial insects.

Marbled hatchetfish species of fish

The marbled hatchetfish is a small, normally 3.5 cm (1.4 in) in length, freshwater ray-finned fish native to South America. Hatchet shaped, it presents a gold line extending from its eye to its caudal fin while the area below has a brown and cream colored marble-like pattern.

<i>Argyropelecus hemigymnus</i> species of fish

Argyropelecus hemigymnus, the half-naked hatchetfish, short silver hatchetfish or spurred hatchetfish, is a deep-sea hatchetfish of the genus Argyropelecus found in mesopelagically in all oceans. It is a small species rarely exceeding 38 millimetres (1.5 in) standard length. It feeds on zooplankton, particularly ostracods and copepods. Sexual maturation occurs at length of about 22 mm, and adult males have more developed olfactory organs than females, i.e. the species is sexually dimorphic.

Giant hatchetfish species of fish

The giant hatchetfish or greater silver hatchetfish, a marine hatchetfish of the genus Argyropelecus, is found in every ocean except the north Pacific in the mesopelagic zone of tropical and subtropical waters. "Giant" in relative terms only, this is the largest species of marine hatchetfishes, often exceeding 110 millimetres (4.3 in) standard length.

Black-winged hatchetfish species of fish

The black-winged hatchetfish is a freshwater ray-finned fish native to South America.

<i>Argyropelecus aculeatus</i> species of fish

The lovely hatchetfish or Atlantic silver hatchetfish is a species of fish in the Sternoptychidae family. It may exceed 70 millimetres (2.8 in) standard length (SL). It lives in the mesopelagic zone of all oceans and performs diel vertical migration. A. aculeatus feeds on a large range of prey items; in the Gulf of Mexico ostracods and copepods dominated the diet of small individuals and euphausiids, molluscs, and fish the diet of larger ones. The silvery coloration and bioluminescence of the lovely hatchetfish allows it to hide from predators and prey in the down-welling light of the twilight zone.

A. gigas may refer to:

Triportheus is a genus of characiform fishes from South America, including Trinidad, ranging from the Rio de la Plata basin to the basins of the Orinoco and Magdalena. Some are migratory.

<i>Carnegiella</i> genus of fishes

Carnegiella is a genus of freshwater hatchetfishes found in the Amazon and Orinoco basins in South America. This genus contains some popular aquarium fishes.

<i>Gasteropelecus</i> genus of fishes

Gasteropelecus is a genus of freshwater hatchetfishes found in Central and South America. This genus includes some popular aquarium fishes. There are currently three described species in this genus.

Carnegiella schereri, a species of hatchetfish, is native to the Amazon Basin in Peru and Brazil. It is often sold for the aquarium hobby under the name silver hatchetfish, dwarf hatchetfish, or Scherer's hatchetfish, and grows to about 2.6 centimeters.

<i>Sternoptyx diaphana</i> species of fish

Sternoptyx diaphana, the diaphanous hatchetfish, is a species of deep sea ray-finned fish in the family Sternoptychidae. It is the type species of the genus Sternoptyx, and was first described by the French naturalist Johann Hermann in 1781.


  1. Froese, Rainer, and Daniel Pauly, eds. (2014). Species of Thoracocharax in FishBase . December 2014 version.

"Thoracocharax Fowler, 1907". Integrated Taxonomic Information System.

Integrated Taxonomic Information System Authoritative taxonomic information on plants, animals, fungi, and microbes

The Integrated Taxonomic Information System (ITIS) is an American partnership of federal agencies designed to provide consistent and reliable information on the taxonomy of biological species. ITIS was originally formed in 1996 as an interagency group within the US federal government, involving several US federal agencies, and has now become an international body, with Canadian and Mexican government agencies participating. The database draws from a large community of taxonomic experts. Primary content staff are housed at the Smithsonian National Museum of Natural History and IT services are provided by a US Geological Survey facility in Denver. The primary focus of ITIS is North American species, but many biological groups exist worldwide and ITIS collaborates with other agencies to increase its global coverage.