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Diagnostic Description ( Anglèis )

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Scales completely absent (Ref. 30189). Dark brown dorsal surface, irregular dark brown bars and bands extending down sides, ventral surface yellow-cream in color (Ref. 30189).
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Recorder
Susan M. Luna
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Life Cycle ( Anglèis )

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Oviparous. Spawn in spring (Ref. 30189).
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Armi G. Torres
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Morphology ( Anglèis )

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Dorsal spines (total): 0; Dorsal soft rays (total): 10 - 12; Analspines: 0; Analsoft rays: 11 - 13; Vertebrae: 53 - 54
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Susan M. Luna
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Trophic Strategy ( Anglèis )

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Occurs in the rocky margin of Clarence Lagoon, its outlet stream and several tributaries that flow into the lake. Feeds partly on insects and their larvae.
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Drina Sta. Iglesia
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Biology ( Anglèis )

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Found in shelter of rocks and boulders in lacustrine habitats, also found in swamps and streams draining in and out of lakes (Ref. 44894). Adults occur in the rocky margin of Clarence Lagoon, its outlet stream and several tributaries that flow into the lake. Adults feed on benthic crustaceans while juveniles feed partly on planktonic crustaceans, and insects and their larvae (Ref. 30189, 44894). Very secretive species, darts for cover under boulders if disturbed. The entire life cycle (may live for up to four years) takes place in fresh water. Adults move into inlet streams to spawn in spring. The demersal eggs take about 2 months to hatch. Fry reside in open surface waters of the lake (Ref. 44894).
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Tess Cruz
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Clarence galaxias ( Anglèis )

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Galaxias clarence.jpg

The Clarence galaxias (Galaxias johnstoni) is a species of fish in the family Galaxiidae endemic to Tasmania.

Description

The Clarence galaxias is scaleless and has a dark brown back with brown bars and bands extending down its sides, while the belly is a lighter yellow-cream color. Adults reach a body length of 12.5–14 cm and a maximum weight of 20 g.[2][3]

Distribution and habitat

The Clarence galaxias is a freshwater species and inhabits lakes as well as swamps and streams connected to lakes.[3] It is endemic to Tasmania's Derwent River catchment, including the Clarence Lagoon. Only seven breeding populations are currently known.[2]

Conservation

While locally common, the species has been classified as endangered by the IUCN.[1] It is under pressure from predation and competition from introduced brown trout and rainbow trout.[2]

References

  1. ^ a b Freeman, R. (2019). "Galaxias johnstoni". IUCN Red List of Threatened Species. 2019: e.T8806A129040727. doi:10.2305/IUCN.UK.2019-3.RLTS.T8806A129040727.en. Retrieved 14 November 2021.
  2. ^ a b c Jean Jackson; David Crook (2002). "Clarence galaxias - Galaxias johnstoni" (PDF). ASFB Newsletter. Australian Society for Fish Biology. 32 (1).
  3. ^ a b "Galaxias johnstoni". Fish Base. Retrieved 9 February 2013.
Clarence galaxias in net.jpg
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Clarence galaxias: Brief Summary ( Anglèis )

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Galaxias clarence.jpg

The Clarence galaxias (Galaxias johnstoni) is a species of fish in the family Galaxiidae endemic to Tasmania.

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