| Rasbora sarawakensis | |
|---|---|
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| male | |
 | |
| female | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Cyprinidae |
| Subfamily: | Danioninae |
| Genus: | Rasbora |
| Species: | R. sarawakensis |
| Binomial name | |
| Rasbora sarawakensis | |
Rasbora sarawakensis, also known as the blue line rasbora or Sarawak rasbora, is a species of ray-finned fish in the genus Rasbora which is endemic to the island of Borneo.
Rasbora sarawakensis males reach a maximum standard length of 4.5 cm. [1] It is a relatively stout bodied Rasbora with a large, pointed head. It has a golden ground colour with orange fins and blue longitudinal stripe. [2] The less colourful females are normally larger and more pot-bellied than the more highly coloured males. [3] [4] These fish are usually found in schools of 7 to 12 or more.
Rasbora sarawakensis is endemic to Borneo, occurring in both the Malaysian state of Sarawak and the Indonesia province of Kalimantan Barat. Within its range it has from many river systems including the Batang Kayan and Sungai Sarawak in Sarawak and the Mempawah and Melawi in Kalimantan Barat. [3]
Rasbora sarawakensis occurs in rather sluggish flowing forest streams, with dense emergent vegetation, often lying within the shade of the rainforest canopy. The bed of these streams is normally made up of a thick layer of silt which is covered with fallen tree limbs and leaf litter, the water is usually relatively clear but has a pale brown color from the tannins released by the organic matter that has fallen into the stream as it decomposes. [3]
The diet of Rasbora sarawakensis is not known but like its congeners it probably feeds on both aquatic invertebrates and on terrestrial invertebrates which fall into the water. [3] It is a sociable fish living in schools where the brighter males display with each other to attract females [3] It is thought that its breeding behaviour is similar to other rasboras in that it is a continuous egg-scattering fish which does not demonstrate any parental care.
Rasbora sarwakensis is not common in the aquarium trade but it is an attractive and sociable species which can be found for sale imported from Borneo. It has not yet been bred in captivity although Rasboras will occasionally spawn in the right aquarium conditions [3] [2]
The earless monitor lizard is a semiaquatic, brown lizard native to the Southeast Asian island of Borneo. It is the only living species in the family Lanthanotidae and it is related to the true monitor lizards.
Cryptocoryne is a genus of aquatic plants from the family Araceae. The genus is naturally distributed in tropical regions of India, Southeast Asia and New Guinea.
The flagfish, also known as the American flagfish or Florida flagfish, is a pupfish, a type of killifish, from the family Cyprinodontidae which is endemic to Florida. It is found in the aquarium trade. Its common name derives from the dominant males' body pattern, which bears some resemblance to the "stars and stripes".
The three spot gourami, also known as the opaline gourami, blue gourami, and gold gourami, is a species of fish native to southeastern Asia, but also introduced elsewhere. This gourami gets its name from the two spots along each side of its body in line with the eye, considered the third spot. This species is of minor commercial importance as a food fish in its native range and is also farmed. It is also popular in the aquarium trade.
The Kapuas River is a river in the Indonesian part of Borneo island, at the geographic center of Maritime Southeast Asia. At 1,143 kilometers (710 mi) in length, it is the longest river of Indonesia and one of the world's longest island rivers. It originates in the Müller mountain range at the center of the island and flows west into the South China Sea creating an extended marshy delta. The delta is located west-southwest of Pontianak, the capital of the West Kalimantan province. This Kapuas River should be distinguished from another Kapuas River, which starts on the other side of the same mountain range in central Borneo, but flows to the south, merging with the Barito River and discharging into the Java Sea.
The harlequin rasbora is a small fish in the family Cyprinidae. The species became an instant favorite among aquarists after its introduction in the early 1900s and is the best known and most widely kept species among the rasboras. In 1935, an image of a trio of harlequin rasboras, stamped in 14k gold, would grace the cover of the first edition of William T. Innes's classic Exotic Aquarium Fishes and would remain so through all 19 editions.
The dayak fruit bat or dyak fruit bat is a relatively rare frugivorous megabat species found only on the Sunda Shelf of southeast Asia, specifically the Malay Peninsula south of the Isthmus of Kra, and the islands of Borneo and Sumatra. There are three species in the genus Dyacopterus: D. spadiceus, D. brooksi and D. rickarti. All are found in the forests of Malaysia, Thailand, and the Philippines. Few specimens of any of the three species exist, due not only to their rarity, but also because they rarely enter the subcanopy of the forest where they can be caught in scientists' nets.
Hemigrammus erythrozonus, commonly known as the glowlight tetra, is a small tropical fish from the Essequibo River, Guyana, South America. It is silver in colour and a bright iridescent orange to red stripe extends from the snout to the base of its tail, the front of the dorsal fin being the same color as the stripe. Other fins are silver to transparent. The glowlight tetra is a peaceful, shoaling fish. It is larger than the neon tetra, and its peaceful disposition makes it an ideal, and popular, community tank fish. It should be kept with similar sized, non-aggressive species. Hemigrammus gracilis is a senior synonym. The red-line rasbora of Malaysia and Indonesia has markings and coloring very similar to H. erythrozonus, but is a member of family Cyprinidae, not a close relative.
Mikrogeophagus altispinosus is a species of fish endemic to the Amazon River basin in Brazil and Bolivia. The species is part of the family Cichlidae and subfamily Geophaginae. It is a popular aquarium fish, traded under the common names Bolivian butterfly, Bolivian ram, Bolivian ram cichlid, and ruby crown cichlid.
The eyespot rasbora is a small fish belonging to the Family Cyprinidae, subfamily Danioninae, which is known by the common names of ocellated rasbora, hi-spot rasbora, and eye-spot rasbora, an allusion to the marking situated upon the dorsal fin. This small fish is a popular aquarium fish, having been one of the species featured in the landmark textbook Exotic Aquarium Fishes by Dr William T. Innes. Its appearance in this work only occurs in later editions of the book, however, therefore the species is not subject to the same degree of aquarium domestication as the more familiar harlequin rasbora.
Osphronemus is a genus of large gouramis, the only genus within the subfamily Osphroneminae. These fish are known as the giant gouramis and are native to rivers, lakes, pools, swamps and floodplains in Southeast Asia, with O. exodon from the Mekong basin, O. laticlavius and O. septemfasciatus from Borneo, while O. goramy is relatively widespread. O. goramy has been introduced outside its native range in Asia, Africa and Australia.
Farlowella acus is the type species of a genus of armored catfish commonly known as the twig catfish or whiptail catfish. The species name means “pointed” or a “needle” or “spine”.
The blue-headed pitta is a species of bird in the pitta family Pittidae. It is endemic to Borneo.
Betta pallifina is a species of gourami endemic to the island of Borneo.
Betta mandor is a species of gourami endemic to the island of Borneo where it is only known from the Indonesian province of Kalimantan Barat where it is found in the Kapuas basin. It is an inhabitant of streams and pools in forested swamps, usually found in quite shallow waters. It feeds on insects and other small invertebrate prey. This species can reach a length of 5.7 centimetres (2.2 in) TL. This species can also be found in the aquarium trade.
Boraras brigittae is a species of ray-finned fish in the genus Boraras, also known as chili rasboras or mosquito rasboras, are a very small species of fishes native to the swamps of South West Borneo, Indonesia.
Paedocypris carbunculus is a tiny species of cyprinid fish endemic to peat swamps and blackwater streams in Central Kalimantan, Borneo, Indonesia. It is the most recently described species of the three in the genus Paedocypris and it reaches up to 11.5 mm (0.45 in) in standard length. This shoaling species has been kept and bred for several generations in aquariums.
Vaillantella maassi, the forktail loach, is a species of loach in the family Vaillantellidae, a monogeneric family with two other species, Vaillantella cinnamomea and Vaillantella euepiptera. They are from Southeast Asia.
The giant red tail gourami is a large species of gourami belonging to the family Osphronemidae. It is native to the Southeast Asian island of Borneo, where only known from the Kinabatangan and Segama river basins in Sabah, East Malaysia. First described in 1992 based on an aquarium specimen, its exact range was not entirely certain, leading some source to incorrectly also report it from Indonesia.
The giant gourami is a species of large gourami native to freshwater habitats in Southeast Asia, with its occurrence in other locations due to introductions. This species is commercially important as a food fish and is also farmed. It can also be found in the aquarium trade. The species has been used for weed control, also on highly invasive aquatic plants like Salvinia molesta, as the giant gourami can be a voracious herbivore.