bio.wikisort.org - Animal
The bala shark, Balantiocheilos melanopterus, also known as the tricolor shark, tricolor sharkminnow, silver shark, or shark minnow, is a fish of the family Cyprinidae, and is one of the two species in the genus Balantiocheilos. This species is not a true shark, but is commonly so called because of its torpedo-shaped body and large fins.
| Bala shark | |
|---|---|
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Conservation status | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Cyprinidae |
| Subfamily: | Barbinae |
| Genus: | Balantiocheilos |
| Species: | B. melanopterus |
| Binomial name | |
| Balantiocheilos melanopterus (Bleeker, 1850) | |
| Synonyms | |
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Distribution
The bala shark occurs in the Malay Peninsula, Sumatra, and Borneo.[2][3] Previous records further north in the Mekong and Chao Phraya River is due to confusion with the recently described and possibly extinct B. ambusticauda (although the presence of any Balantiocheilos in the Mekong is questionable).[3]
Appearance and anatomy
These fish have a silver body with black margins on their dorsal, caudal, anal, and pelvic fins. They have big eyes to find and catch their prey. The bala shark will grow to a maximum length of 35 cm (14 in).[2]
Habitat and ecology
Bala sharks are found in midwater depths in large and medium-sized rivers and lakes. They feed on phytoplankton, but mostly on small crustaceans, rotifers, and insects and their larvae.[2]
In the aquarium
| Tank size | 500 litres (125 gallons) |
| Water temperature | 22–28 °C |
| Water salinity | Freshwater (0 ppt) |
| Temperament | Peaceful, schooling and timid when young, best kept in groups of at least 3 |
| Diet | Omnivorous |
| Water hardness | 5–12 °dH |
| pH | 6–8 |
Bala sharks are misunderstood aquarium fish.[5] These fish are generally peaceful and good companions to many other types of tropical fish.[5] Bala sharks are widely available in most pet stores, but will grow to a size too large for the home aquarium.[5]
They are a hardy fish that will tolerate temperature changes, pH changes, and other factors to which other fish may be sensitive. The water pH should be 6.0–8.0. The preferable water hardness for this species is soft to medium (5.0–12.0 dGH). Water temperature should be kept between 22–28 °C (72–82 °F).[2] The bala shark prefers to be kept in groups of two or more specimens.[2] It requires a covered aquarium as it is a skilled jumper, but may injure itself on the lid of the tank.[5]
Very young bala sharks are sometimes kept in small aquaria. However, given their adult size, schooling behavior, and swimming speed, the fish quickly grow to need much more room. Hobbyists continue to debate over acceptable minimum tank sizes, but generally recommend at least a 2-meter tank. FishBase lists a minimum of 150 cm (5 ft).[2] Many believe the fish is simply too large and too active to be kept in residential aquaria at all; only enormous, custom-built tanks are acceptable, if any tank at all is. Indoor ponds are also considered feasible housing options and may be better suited to the average aquarist.[6]
Conservation
Balantiocheilo melanopterus is listed as a vulnerable species by the IUCN Red List.[1] It has become rare or extinct in many river basins of its native range.[2] In Danau Sentarum (Borneo), fishermen already reported in 1993 and 1995 that the populations had decreased dramatically after 1975, for no clear reason. Fishermen mentioned overfishing for the aquarium-fish trade or forest fires in 1975 and the resulting pollution as possible causes. The species is apparently extirpated in the Batang Hari basin (Sumatra) and it seems that all individuals of B. melanopterus exported from Indonesia and Thailand by the aquarium-fish trade are captive bred.[3]
References
- Lumbantobing, D. (2020). "Balantiocheilos melanopterus". IUCN Red List of Threatened Species. 2020: e.T149451010A90331546. doi:10.2305/IUCN.UK.2020-2.RLTS.T149451010A90331546.en. Retrieved 19 November 2021.
- Froese, Rainer; Pauly, Daniel (eds.) (2007). "Balantiocheilos melanopterus" in FishBase. Apr 2007 version.
- Ng, Heok Hee; Kottelat, Maurice (2007). "Balantiocheilos ambusticauda, a new and possibly extinct species of cyprinid fish from Indochina (Cypriniformes: Cyprinidae)" (PDF). Zootaxa. 1463: 13–20. doi:10.11646/zootaxa.1463.1.2. Archived from the original (PDF) on 2007-09-27.
- "aquarium". aquariumsource. Retrieved 10 January 2022.
- Axelrod, Herbert R.; Emmens, C.; Burgess, W.; Pronek, N. (1996). Exotic Tropical Fishes. T.F.H. Publications. ISBN 0-87666-543-1.
- "Bala Shark Care Guide". Tankquarium.
На других языках
- [en] Bala shark
[es] Balantiocheilus melanopterus
El tiburón plata o tiburón tricolor (Balantiocheilus melanopterus) es una especie de pez de la familia de los Cyprinidae. Esta especie no es un tiburón strictu sensu, pero es comúnmente llamado "tiburón" debido a su forma parecida y sus grandes aletas.[ru] Акулий бала
Акулий бала[1] (лат. Balantiocheilos melanopterus) — пресноводная рыба семейства карповых. Длина тела до 35 см. Окраска тела серебристая, на спинном, хвостовом и брюшных плавниках широкая черная краевая кайма. Обитает в Юго-Восточной Азии: в бассейнах рек Меконг и Менам-Чао-Прая, на Малайском полуострове, островах Калимантан и Суматра. Населяет чистые реки и ручьи с быстрым течением. Избегает водоёмов с медленным течением. В бассейнах многих рек стал очень редким или совсем исчез. Является популярной аквариумной рыбкой.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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