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Clarence galaxias
Conservation status
Endangered (IUCN 3.1)^[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Galaxiiformes
Family:	Galaxiidae
Genus:	Galaxias
Species:	G. johnstoni
Binomial name
*Galaxias johnstoni* E. O. G. Scott, 1936

The Clarence galaxias (Galaxias johnstoni) is a species of ray-finned 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]

Behavior

This Galaxia is an ambush predator. They burrow or find a lair to predate from. Unless food is bountiful they show vigor and are aggressive during feeding .They tend to perch themselves on top of structures such as rocks using their pectoral fins regularly. They are more active during the evening. The foods observed eaten are only live foods such as nymphs, mosquito larve, and brine shrimp. Blood worms are an exception and also eaten frozen. Upon further observation, they clunkily get around swimming, turning their body they seem stiff in the mid section. They have tremendous strength relative to size with a thick front section, large gaping jaw and large fan like fins.

References

^ ^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.
^ ^a ^b ^c Jean Jackson; David Crook (2002). "Clarence galaxias - Galaxias johnstoni" (PDF). ASFB Newsletter. 32 (1). Australian Society for Fish Biology. Archived from the original (PDF) on 2016-03-04. Retrieved 2015-08-17.
^ ^a ^b "Galaxias johnstoni". Fish Base. Retrieved 9 February 2013.

Taxon identifiers
Galaxias johnstoni	Wikidata: Q305874 Wikispecies: Galaxias johnstoni AFD: Galaxias_johnstoni BOLD: 717081 CoL: 3F2W3 FishBase: 6202 GBIF: 5214313 iNaturalist: 101156 IRMNG: 11237750 ITIS: 623454 IUCN: 8806 NCBI: 89557 Observation.org: 906138 Open Tree of Life: 456615 Plazi: ECF3830E-0CEB-37FB-4F1D-0D7D7C43BEF9 SPRAT: 26184 WoRMS: 404141 ZooBank: BAA179BC-86B0-4F0E-850B-F71B4CFDA9B7

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