Sunday, August 21, 2011

aquarium fishes

The Giant Danio (Devario aequipinnatus) is a tropical fish belonging to the minnow family Cyprinidae. Originating in Sri Lanka, Nepal, and the West coast of India, this species grows to a maximum length of 6 inches (15 cm), making it one of the largest of the danionins. They are characterized by a blue and yellow torpedo shaped body with gray and clear fins.

In the wild, Giant Danios live in clear streams and rivers among hills at elevations up to 1000 ft (300 m) above sea level. Their native substrate is small gravel . Giant Danios natively live in a tropical climate and prefer water with a 6.0 - 8.0 pH, a water hardness of 5.0 - 19.0 dGH, and a temperature range of 72 - 81 °F (22 - 27 °C). A surface dweller, their diet consists predominantly of exogenous insects, but is also supplemented by worms and crustaceans.

In captivity, the Giant Danio will usually accept most foods. It is a semi-aggressive fish, and may bully other fish in community tanks. The giant danio appreciates water movement to simulate the motion of the rivers and fast-moving streams that it comes from. It is a schooling fish.

The Common carp (Cyprinus carpio) is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia.[2][3] The wild populations are considered vulnerable to extinction, but the species has also been domesticated and introduced into environments worldwide, and is often considered an invasive species.[2] It gives its name to the carp family: Cyprinidae.The common carp is a fish native to Asia which has been introduced to every part of the world with the exception of Eastern Europe, The Middle East and the poles. The original common carp was that found in the inland delta of the Danube river about 2000 years ago, and was torpedo-shaped and golden-yellow in colour. It had two pairs of barbels and a mesh-like scale pattern.

The black ruby barb (Puntius nigrofasciatus) or purplehead barb is a tropical fish belonging to the minnow family (Cyprinidae). Originating from Sri Lanka in forested streams from the Kelani basin to the Nilwala basin, they are found in streams on hills around 1000 ft (300 m) in elevation. The brightly colored population introduced to Mahaweli at Ginigathena, Sri Lanka are said to have diminished in number due to the aquarium export trade. It was originally named Barbus nigrofasciatus.

Copadichromis borleyi is a species of cichlid fish endemic to Lake Malawi in East Africa.[2] The species is popular in the fishkeeping hobby where it is frequently kept in aquariums.[3][4] The species has numerous common names used in the ornamental fish trade including: 'Redfin Hap' (or "Happy" or "Haplo") and 'Goldfin Hap'.[2][4]C. borleyi is a relatively small cichlid, males grow to 13-16 centimetres (5-6 in) total length, while females are typically slightly smaller reaching 13 centimetres.[3][4][5][6] In addition to these minor difference in size, the species displays marked sexual dimorphism with males displaying larger ventral fins marked with egg spots, light-blue edging to the dorsal and ventral fins, along with metallic blue colouration of the head, and yellow to red flanks. In contrast, females are silver-to-brown and display three black spots along their sides.[3] Juveniles are monomorphic and are coloured like the adult females.[6] Some intraspecific variation has been recorded with regard to colouration, these differently coloured forms are geographically restricted to certain localities in Lake Malawi.[6]

The Reedfish, Erpetoichthys calabaricus, Ropefish (a name more commonly used in the United States), or Snakefish is a species of freshwater fish in the bichir family and order. It is the only member of the genus Erpetoichthys. It is native to West Africa, with its natural habitat stretching from Nigeria to The Congo.
The Reedfish has a maximum total length of 37 centimetres (14.5 inches). It lives in slow-moving, brackish or fresh water[citation needed], warm water (22-28 °C), and it can breathe atmospheric air (meaning it is able to survive in water with low dissolved oxygen content) using a pair of lungs. This organ means it can survive for an intermediate amount of time out of water. The Reedfish is a nocturnal creature that feeds on annelid worms, crustaceans and insects at night, and it is sometimes displayed in aquariums. Its genus name, Erpetoichthys, derives from the Greek words erpeton ("creeping thing") and ichthys ("fish"). The genus is also known by the name Calamoichthys.[1]

Bichirs are elongated fish with a distinctive series of up to fifteen dorsal finlets, instead of a single dorsal fin. Each of these finlets has a sharp spine. The body is covered in thick, bonelike, ganoid scales. Their jaw structure more closely resembles that of the tetrapods than that of the teleost fishes. Bichirs have a number of other primitive characteristics, including fleshy pectoral fins superficially similar to those of lobe-finned fishes.[1] They also have spiracles.
Bichirs have rudimentary lungs, which allow them to obtain oxygen from the air when in poorly oxygenated waters,[2] by swimming quickly to the surface and back to the bottom. They are nocturnal, and feed on small vertebrates, crustaceans, and insects.[1]
Bichirs have a maximum body length of 97 centimetres (3.18 ft).[3

Arowanas are freshwater bony fish of the family Osteoglossidae, also known as bonytongues.[1] In this family of fishes, the head is bony and the elongate body is covered by large, heavy scales, with a mosaic pattern of canals. The dorsal and the anal fins have soft rays and are long based, while the pectoral and ventral fins are small. The name "bonytongues" is derived from a toothed bone on the floor of the mouth, the "tongue", equipped with teeth that bite against teeth on the roof of the mouth. The fish can obtain oxygen from air by sucking it into the swim bladder, which is lined with capillaries like lung tissue. The arowana is an "obligatory air breather".[2]

Angelfish may refer to:
Several groups of fish:
Freshwater angelfish, tropical cichlids of the genus Pterophyllum
Marine angelfish of the family Pomacanthidae
Angel shark of the family Squatinidae
Ringstraked guitarfish (Rhinobatos hynnicephalus), a species of guitarfish
Atlantic spadefish (Chaetodipterus faber)
Cave angelfish, a karst-dwelling member of the family Balitoridae, found only in Thailand

Flowerhorn cichlids are ornamental aquarium fish noted for their vivid colors and the distinctively shaped heads for which they are named. Their head protuberance, or kok, is formally termed a "nuchal hump." Like blood parrot cichlids, they are man-made hybrids that do not exist in nature. First developed in Malaysia and Taiwan, they are now kept by fish hobbyists worldwide. Some critics have questioned the impact of flowerhorn breeding programs.

The goldfish (Carassius auratus auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It was one of the earliest fish to be domesticated, and is one of the most commonly kept aquarium fish.
A relatively small member of the carp family (which also includes the koi carp and the crucian carp), the goldfish is a domesticated version of a less-colorful carp (Carassius auratus) native to east Asia. It was first domesticated in China more than a thousand years ago, and several distinct breeds have since been developed. Goldfish breeds vary greatly in size, body shape, fin configuration and coloration (various combinations of white, yellow, orange, red, brown, and black are known).

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