| Dwarf galaxias | ||||||||||||||||
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| Galaxias divergens Stokell, 1959 |
The dwarf galaxias, Galaxias divergens, is a galaxiid of the genus Galaxias, found only in the lower North Island and upper South Island of 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 North Island is one of the two main islands of New Zealand, the other being the South Island. The South Island is the larger of the two major islands of New Zealand, the other being the more populous North Island. 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 9 cm. A centimetre ( American spelling: centimeter, symbol cm) is a unit of Length in the Metric system, equal to one hundredth
The dwarf galaxias is amber to olive green in colour with dark brown blotches on the sides and back forming indistinct vertical bars. The belly is silvery. The single dorsal and anal fins are about two thirds of the way along the body. 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 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
The dwarf galaxias has six pelvic fin rays, which distinguishes it from most other galaxiids which have only five. 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
Spawning occurs from March to May and also from October to November. They live on a variety of aquatic insects, especially mayflies and midges. Insects ( Class Insecta) are a major group of Arthropods and the most diverse group of Animals on the Earth with over a million described Mayflies are Insects which belong to the Order Ephemeroptera (from the Greek ephemeros = "short-lived" pteron Midges comprise many kinds of very small two-winged flies The term does not encapsulate a well-defined taxonomic group but includes animals in several families of Nematoceran They are non-diadromous and therefore do not have a marine phase and are 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 divergens". 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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