| Roundhead galaxias | ||||||||||||||||
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| Galaxias anomalus Stokell, 1959 |
The roundhead galaxias, Galaxias anomalus, is a galaxiid of the genus Galaxias, found only in the Taieri and Clutha catchments in Otago, New Zealand. Gerald Stokell ( 20 June 1890 - 10 July 1972) was a New Zealand horticulturist and ichthyologist. The Galaxiids are a family of mostly small freshwater Fish. Representatives occur throughout the southern hemisphere including South Africa, South America A genus (plural genera from Γένος Latin genus "descent family type gender" is a low-level Taxonomic The Strath Taieri is a large glacial valley and River Plateau, surrounded by rugged hill ranges located to the north and west of Otago Harbour. Clutha may refer to Clutha (dance, a Scottish country dance The Clutha, a traditional Scottish band History See also History of Otago The Otago Settlement sponsored by the Free Church of Scotland, materialised in March 1848 with the arrival of the first New Zealand is an Island country in the south-western Pacific Ocean comprising two main landmasses (the North Island and the South Island It grows to a length of up to 13 cm. A centimetre ( American spelling: centimeter, symbol cm) is a unit of Length in the Metric system, equal to one hundredth
The roundhead galaxias has 16 caudal fin rays, and this is used to distinguish it from dusky galaxias Galaxias pullus (14 fin rays), and Eldons galaxias Galaxias eldoni (15 fin rays), both of which also occur in the Taieri River catchment. The Anatomy of Fish is primarily governed by the physical characteristics of Water, which is much denser than air holds a relatively small amount of dissolved The dusky galaxias, Galaxias pullus, is a Galaxiid of the Genus Galaxias, found only in the Taieri and Clutha The Eldons galaxias, Galaxias eldoni, is a Galaxiid of the Genus Galaxias, found only in the Taieri catchment in
The single dorsal and anal fins are rounded, and set back about three quarters of the body length. A dorsal fin is a Fin located on the backs of some Fishes Whales Dolphins and Porpoises as well as the (extinct The Anatomy of Fish is primarily governed by the physical characteristics of Water, which is much denser than air holds a relatively small amount of dissolved The pelvic fins are about half way along the underside of the body. The Anatomy of Fish is primarily governed by the physical characteristics of Water, which is much denser than air holds a relatively small amount of dissolved Like all galaxiids it lacks scales and has a thick, leathery skin covered with mucus. In most biological nomenclature a scale ( Greek lepid, Latin squama) is a small rigid plate that grows out of an Animal In vertebrates mucus is a slippery secretion produced by and covering Mucous membranes It is a viscous Colloid containing Antiseptic enzymes (such as Colouring is irregular dark brown markings on a light brown background.
Roundhead galaxias occupy a diverse range of low gradient streams, from small weedy drains to braided cobble streams. They are tolerant of high water temperatures and low flows, surviving droughts by living in remnant pools that remain in ephemeral streams. They are non-diadromous and therefore do not have a marine phase and is not part of the whitebait catch. Many types of fish undertake migrations on a regular basis on time scales ranging from daily to annual and with distances ranging from a few meters to thousands of kilometers This article is concerned with whitebait as the juvenile of various species of fish around the world for other uses of the term see Whitebait (disambiguation.
References
- "Galaxias anomalus". FishBase. FishBase is a comprehensive Database of information about Fish. Ed. Ranier Froese and Daniel Pauly. March 2006 version. N. p. : FishBase, 2006.
- NIWA June 2006
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