Anabantoidei

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Anabantoidei
Temporal range: Eocene–Recent
Colisa lalia.jpg
Dwarf gourami (Trichogaster lalius)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Anabantiformes
Suborder: Anabantoidei
Berg, 1940 [1]
Families [2] [3]

The Anabantoidei are a suborder of anabantiform ray-finned freshwater fish distinguished by their possession of a lung-like labyrinth organ, which enables them to breathe air. The fish in the Anabantoidei suborder are known as anabantoids or labyrinth fish, or colloquially as gouramies. Some labyrinth fish are important food fish, and many others, such as the Siamese fighting fish and paradise fish, are popular as aquarium fish.

Contents

Labyrinth organ

The labyrinth organs, a defining characteristic of fish in the suborder Anabantoidei, is a much-folded suprabranchial accessory breathing organ. It is formed by vascularized expansion of the epibranchial bone of the first gill arch and used for respiration in air. [4]

This organ allows labyrinth fish to take in oxygen directly from the air, instead of taking it from the water in which they reside through use of gills. The labyrinth organ helps the inhaled oxygen to be absorbed into the bloodstream. As a result, labyrinth fish can survive for a short period of time out of water, as they can inhale the air around them, provided they stay moist.

Labyrinth organ of a climbing perch ( Anabas testudineus ) Labyrinth organ ( Anabas testudineus ).jpg
Labyrinth organ of a climbing perch ( Anabas testudineus )

Labyrinth fish are not born with functional labyrinth organs. The development of the organ is gradual; most labyrinth fish initially breathe entirely with their gills, and develop the labyrinth organs as they grow older. [4]

Range

Labyrinth fish are endemic to fresh waters of Asia and Africa. In Asia, they are found throughout East, Southeast, and South Asia, especially but not exclusively in the warm, slow-flowing, low-oxygen waters. In Africa, significantly smaller numbers of labyrinth fish can be found in the southern half of the continent, with concentrations in the rainforest waters. [4]

The characteristics of the fish habitats are indicators of the size of the labyrinth organ, as the organ size is negatively correlated with the level of oxygen in the waters. Species native to low-oxygen waters are more likely to have larger and more complex labyrinth organs than species found in fast-flowing, oxygen-rich waters. [4]

Behavior

A male Siamese fighting fish, Betta splendens, is building a bubble nest. Betta with BubbleNest.jpg
A male Siamese fighting fish, Betta splendens, is building a bubble nest.

In general, the labyrinth fish are carnivores that eat small aquatic organisms and carrion. Some species will also consume algae and water plants. Most fish are active during daytime, but several African species feed at twilight and night. Species of the genus Trichogaster can spit water toward insects to bring them down to the water surface, similarly to the archerfish behavior. [4]

Labyrinth fish are well known for their bubble-nesting behavior, although some species do not build bubble nests and employ other methods of brooding. For the bubble nesting species, males establish nesting territories and defend them vigorously. As the name suggests, the bubble nests are floating bubbles coated with oral mucus from the males. Typically, the male bubble nesters stay nearby to guard the nests and constantly retrieve any falling eggs and fry to the nest. Some Betta species from fast-flowing waters, however, are mouthbrooders and do not build bubble nests. [5] In these species, males hold the eggs and fry in their mouths and release the free-swimming fry about a week to 10 days after spawning.

Phylogeny

Phylogeny of families and genera in Anabatoidei based on mitochondrial DNA sequences: [6]

Anabantoidei
Anabantidae

Anabas

Sandelia

Ctenopoma

Microctenopoma

Helostomatidae

Helostoma

Osphronemidae
Osphroneminae

Osphronemus

Belontia

Luciocephalinae

Luciocephalus

Sphaerichthys

Ctenops

Parasphaerichthys

Trichopodus

Trichogaster

Macropodusinae

Trichopsis

Macropodus

Malpulutta

Pseudosphromenus

Betta

Parosphromenus

Anabantoids as food fish

The giant gourami, Osphronemus goramy, is often raised in floating cages in central Thailand. Giant.gourami.arp.jpg
The giant gourami, Osphronemus goramy, is often raised in floating cages in central Thailand.

Several labyrinth fish are important food sources in their native countries. The giant gourami, in particular, is highly valued as food fish, due to its size and tender flesh with few spines. [7] This species is farmed extensively in Thailand and other Southeast Asian countries, and was intentionally introduced in tropical and subtropical waters around the world. During the colonial period, the French attempted to introduce this fish to many of their territories. Although an attempt to introduce a population in southern France failed, the giant gourami became well established in other French colonies. [4] In the late 1880s, attempts to introduce the giant gourami to California waters as food fish were unsuccessful. In the 1950s, a giant gourami population was established in Hawaii. [8]

Other smaller labyrinth fish, such as the climbing perch, the kissing gourami, the snakeskin gourami, and other gouramies of the genus Trichogaster , are local food fish in Southeast Asia. [4] In some areas, the fish are processed into salted and dried food. [9]

Anabantoids as aquarium fish

The Siamese fighting fish, Betta splendens, originally bred for staged fights, has become popular in the aquarium trade Betta cambodian.jpg
The Siamese fighting fish, Betta splendens, originally bred for staged fights, has become popular in the aquarium trade

The Siamese fighting fish is perhaps the most popular labyrinth fish in the aquarium trade. The paradise fish also has a long aquarium history and was one of the first aquarium fish introduced to the West. [4] Many species of gouramies, particular the three spot gourami and the dwarf gourami, are commercially bred for the trade, and several color morphs are commonly available. Because of their capability to use atmospheric oxygen, these fish generally are not so dependent on a form of aeration in their tanks, as they can rise to the surface of the water and take a breath, or breathing apparatus. Many of the labyrinth fish are peaceful and do well in most community tanks. However, individual males, especially the Siamese fighting fish and paradise fish, are territorial towards each other. Male Siamese fighting fish cannot be kept together under any circumstances, as they have been bred for aggression and will fight to the death. In many breeding pairs, the male and female cannot be kept together for long periods of time. Males may perceive males of other species as competition if they have long and bright fins and attack them, as well. For other species of anabantoids, a large aquarium with only one male per tank is ideal to prevent aggression.

Related Research Articles

<span class="mw-page-title-main">Climbing gourami</span> Family of fishes

The Anabantidae are a family of ray-finned fish within the order Anabantiformes commonly called the climbing gouramies or climbing perches. The family includes about 34 species. As labyrinth fishes, they possess a labyrinth organ, a structure in the fish's head which allows it to breathe atmospheric oxygen. Fish of this family are commonly seen gulping at air at the surface of the water. The air is held in a structure called the suprabranchial chamber, where oxygen diffuses into the bloodstream via the respiratory epithelium covering the labyrinth organ. This therefore allows the fish to move small distances across land.

<span class="mw-page-title-main">Gourami</span> Family of fishes

Gouramis, or gouramies, are a group of freshwater anabantiform fish that comprise the family Osphronemidae. The fish are native to Asia—from the Indian Subcontinent to Southeast Asia and northeasterly towards Korea. The name "gourami", of Indonesian origin, is also used for fish of the families Helostomatidae and Anabantidae.

<span class="mw-page-title-main">Three spot gourami</span> Species of fish

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 species reaches 15 cm in standard length.

<span class="mw-page-title-main">Kissing gourami</span> Species of freshwater fish

Kissing gouramis, also known as kissing fish or kissers, are medium-sized tropical freshwater fish comprising the monotypic labyrinth fish family Helostomatidae. These fish originate from Mainland Southeast Asia, the Greater Sundas and nearby smaller islands, but have also been introduced outside their native range. They are regarded as a food fish and they are sometimes farmed. They are used fresh for steaming, baking, broiling, and pan frying. The kissing gourami is a popular aquarium fish.

<span class="mw-page-title-main">Paradise fish</span> Species of fish

The fork tailed paradisefish, or paradise gourami is a species of gourami found in most types of fresh water in East Asia, ranging from the Korean Peninsula to northern Vietnam. This species can reach a standard length of 6.7 cm, though most are only about 5.5 cm . Paradise gouramis were one of the first ornamental fish available to western aquarium keepers, having been imported 1869 to France by the French aquarium fish importer Pierre Carbonnier in Paris. The paradise fish is one of the more aggressive members of its family. It is more aggressive than the three spot gourami, yet less pugnacious in nature than the less commonly kept combtail.

<span class="mw-page-title-main">Dwarf gourami</span> Species of fish

The dwarf gourami is a species of gourami native to South Asia.

<span class="mw-page-title-main">Bubble nest</span>

Bubble nests, also called foam nests, are created by some fish and frog species as floating masses of bubbles blown with an oral secretion, saliva bubbles, and occasionally aquatic plants. Fish that build and guard bubble nests are known as aphrophils. Aphrophils include gouramis and the synbranchid eel Monopterus alba in Asia, Microctenopoma (Anabantidae), Polycentropsis (Nandidae), and Hepsetus odoe in Africa, and callichthyines and the electric eel in South America. Most, if not all, fish that construct floating bubble nests live in tropical, oxygen-depleted standing waters. Osphronemidae, containing the Bettas and Gouramies, are the most commonly recognized family of bubble nest makers, though some members of that family mouthbrood instead. The nests are constructed as a place for fertilized eggs to be deposited while incubating and guarded by one or both parents until the fry hatch.

<span class="mw-page-title-main">Croaking gourami</span> Species of fish

The croaking gourami is a species of small freshwater labyrinth fish of the gourami family. They are native to still waters in Southeast Asia and are distributed worldwide via the aquarium trade. Croaking gouramis are capable of producing a "croaking" noise using their pectoral fins.

<span class="mw-page-title-main">Pygmy gourami</span> Species of fish

The pygmy gourami, also known as the sparkling gourami, is a freshwater species of gourami native to Southeast Asia.

<span class="mw-page-title-main">Thick-lipped gourami</span> Species of fish

The thick-lipped gourami is a species of gourami native to Southeast Asia, and is a popular aquarium fish.

<i>Osphronemus</i> Genus of fishes

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.

<span class="mw-page-title-main">Moonlight gourami</span> Species of fish

The moonlight gourami, also known as the moonbeam gourami, is a labyrinth fish of the family Osphronemidae native to Indochina. This peaceful species is a popular aquarium fish.

<span class="mw-page-title-main">Snakeskin gourami</span> Species of fish

The snakeskin gourami is a species of gourami native to Southeast Asia. Prior to the merging of Belontidae to the family Osphronemidae, the snakeskin gourami was regarded as the largest member of its family. It is still the largest species in its genus and subfamily.

<i>Trichopodus</i> Genus of fishes

Trichopodus is a genus of tropical freshwater labyrinth fish of the gourami family found in Southeast Asia. Gouramis of the genus Trichopodus are closely related to those of Trichogaster ; species of both genera have long, thread-like pelvic fins used to sense the environment. However, Trichopodus species have shorter dorsal fin base and, when sexually mature, are much larger, with the largest, the snakeskin gourami, capable of reaching a length of over 8 in (20 cm).

<span class="mw-page-title-main">Peaceful betta</span> Species of fish

The peaceful betta or crescent betta is a species of gourami native to Southeast Asia.

<span class="mw-page-title-main">Honey gourami</span> Species of fish

The honey gourami is a species of gourami native to India and Bangladesh.

<i>Trichogaster fasciata</i> Species of fish

Trichogaster fasciata, the banded gourami or striped gourami or Colisa or Kholshe, is a tropical labyrinth perch found in some Asian countries like Bangladesh, Eastern India, Northeastern India, Nepal, Upper Myanmar, China and Pakistan.

<span class="mw-page-title-main">Giant red tail gourami</span> Species of fish

The giant red tail gourami is a large species of gourami belonging to the family Osphronemidae. This endangered fish 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.

<span class="mw-page-title-main">Giant gourami</span> Species of fish

The giant gourami is a species of large gourami native to freshwater habitats in Southeast Asia. It has also been introduced elsewhere. The species is commercially important as a food fish and is also farmed. It can be found in the aquarium trade, as well. The species has been used for weed control on highly invasive aquatic plants like Salvinia molesta, as the giant gourami can be a voracious herbivore.

<span class="mw-page-title-main">Anabantiformes</span> Order of fishes

The Anabantiformes, collectively known as labyrinth fish, are an order of air-breathing freshwater ray-finned fish with two suborders, five families and having at least 207 species. In addition, some authorities expand the order to include the suborder Nandoidei, which includes three families - the Nandidae, Badidae and Pristolepididae - that appear to be closely related to the Anabantiformes. The order, and these three related families, are part of a monophyletic clade which is a sister clade to the Ovalentaria, the other orders in the clade being Synbranchiformes, Carangiformes, Istiophoriformes and Pleuronectiformes. This clade is sometimes referred to as the Carangaria but is left unnamed and unranked in Fishes of the World. This group of fish are found in Asia and Africa, with some species introduced in United States of America.

References

  1. Karel F. Liem (1963). The comparative osteology and phylogeny of the Anabantoidei (Teleostei, Pisces). Illinois biological monographs. Vol. 30. Urbana,University of Illinois Press,1963.
  2. "Anabantoidei". Integrated Taxonomic Information System . Retrieved 30 June 2006.
  3. Richard van der Laan; William N. Eschmeyer & Ronald Fricke (2014). "Family-group names of Recent fishes". Zootaxa. 3882 (2): 001–230.
  4. 1 2 3 4 5 6 7 8 Pinter, H. (1986). Labyrinth Fish. Barron's Educational Series, Inc., ISBN   0-8120-5635-3
  5. Parnell, V. (2006). "A look inside the bubblenest". Archived from the original on 2007-03-11. Retrieved 2006-12-23.
  6. Rüber, L.; R.Britz; R. Zardoya; P. Linder (2006). "Molecular Phylogenetics and Evolutionary Diversification of Labyrinth Fishes (Perciformes: Anabantoidei)". Systematic Biology. 55 (3): 374–397. doi: 10.1080/10635150500541664 .
  7. Chanphong, Jitkasem. (1995). Diseases of Giant Gourami, Osphronemus goramy (Lacepede) Archived January 6, 2007, at the Wayback Machine . The Aquatic Animal Health Research Institute Newsletter 4(1).
  8. Nico, L. (2006). Osphronemus gorami Archived 2009-05-11 at the Wayback Machine . USGS Nonindigenous Aquatic Species Database, Gainesville, FL.
  9. Froese, R.; D. Pauly (eds.). "Trichogaster trichopterus". FishBase. Retrieved 2006-12-23.