The Cambodian logsucker (''Garra cambodgiensis''), also known as stonelapping minnow or false Siamese algae eater, is a species of

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or h ...

in the genus ''

Garra ''Garra'' is a genus of fish in the family Cyprinidae. These fish are one example of the "log suckers", sucker-mouthed barbs and other cyprinids commonly kept in aquaria to keep down algae. The doctor fish of Anatolia and the Middle East belo ...

''. It lives in Southeast Asia.

Description

The Cambodian logsucker has a broad midlateral stripe which has a width roughly equal to two scale rows, it has two black bands on the

dorsal fin A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through c ...

while the

caudal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as ...

may be plain or have dark margins. They are

sexually dimorphic Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most ani ...

with the females having fuller, rounder bellies than the males, the males develop a red inside of the mouth during the spawning season and both sexes develop tubercules on the head and snout when breeding, although these are more obvious in the males. They grow to standard length.

Distribution

The Cambodian logsucker lives in the

Mekong The Mekong or Mekong River is a trans-boundary river in East Asia and Southeast Asia. It is the world's twelfth longest river and the third longest in Asia. Its estimated length is , and it drains an area of , discharging of water annual ...

of Laos, Cambodia and Thailand, as well as in the

Mae Klong The Mae Klong (, , ), sometimes spelled Mae Khlong or Meklong, is a river in western Thailand. The river begins at the confluence of the Khwae Noi (Khwae Sai Yok) and the Khwae Yai River (Khwae Si Sawat) in Kanchanaburi, it passes Ratchaburi ...

Chao Phraya The Chao Phraya ( or ; th, แม่น้ำเจ้าพระยา, , or ) is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Bangkok and then into the Gulf of Thailand. E ...

and the river systems of south eastern Thailand in

Phrae Phrae (; ) is a town (''thesaban mueang'') in northern Thailand, capital of Phrae Province. The town occupies ''tambon'' Nai Wiang of Mueang Phrae District. It has an area of nine kilometres2 and a population of 17,971 (2005). Phrae is 555 km no ...

Phitsanulok Phitsanulok ( th, พิษณุโลก, ) is an important, historic city in lower northern Thailand and is the capital of Phitsanulok Province. Phitsanulok is home to Naresuan University and Pibulsongkram Rajabhat University, as well a ...

Ubon Ratchathani Ubon Ratchathani ( th, อุบลราชธานี, ) is one of the four major cities of Isan (with Khorat/ Nakhon Ratchasima, Udon Thani, and Khon Kaen), also known as the "big four of Isan." The city is on the Mun River in the so ...

, Trang, Chanthaburi, Chiang Mai,

Nakhon Si Thammarat Nakhon Si Thammarat Municipality ( th, เทศบาลนครนครศรีธรรมราช, ; from Pali ''Nagara Sri Dhammaraja'') is a municipality (''thesaban nakhon'') in Southern Thailand, capital of Nakhon Si Thammarat pro ...

Kanchanaburi Kanchanaburi ( th, กาญจนบุรี, ) is a town municipality (''thesaban mueang'') in the west of Thailand and part of Kanchanaburi Province. In 2006 it had a population of 31,327. That number was reduced to 25,651 in 2017. The town ...

, Nakhon Sawan, Yala,

Chiang Rai Chiang Rai ( th, เชียงราย, ; nod, , เจียงฮาย, ) is the northernmost major city in Thailand, with a population of about 200,000 people. It is located in Mueang Chiang Rai District, Chiang Rai Province. Chiang Rai ...

and

Surat Thani Surat Thani ( th, สุราษฎร์ธานี, ) is a city in Amphoe Mueang Surat Thani, Surat Thani Province, southern Thailand. It lies south of Bangkok. It is the capital of Surat Thani Province. The city has a population of 1 ...

provinces of Thailand, in Peninsular Malaysia and in southeastern Mymanmar.

Habits and ecology

The Cambodian logsucker lives in rapidly flowing, small to medium sized streams with rocky beds. In submontane to hill regions, it may also occur in larger or lowland rivers. At the start of the

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal osci ...

, it moves into floodplains or paddy fields where it breeds. The fry are cared for by the parents until they are juveniles, at which point they return to the streams. It feeds on

periphyton Periphyton is a complex mixture of algae, cyanobacteria, heterotrophic microbes, and detritus that is attached to submerged surfaces in most aquatic ecosystems. The related term Aufwuchs (German "surface growth" or "overgrowth") refers to the col ...

, phytoplankton and some insects. It is sociable in the wild, forming hierarchies in loose shoals. To settle disputes, the males charge each other, flare their fins, become paler in colour and extend their rostral processes.

Human use

The Cambodian logsucker is eaten by some local humans, especially when spawning. It is common in the aquarium trade, but must be hormonally induced to breed in captivity.

References

{{Taxonbar, from=Q3234848 Garra Fish of Thailand Fish described in 1883 Taxa named by Gilbert Tirant