Murray jollytail (Galaxias rostratus) fish species and information / pictures of Murray jollytail - Galaxias rostratus

Murray jollytail (Galaxias rostratus) fish species information

Scientific Name
Galaxias rostratus

Common Name
Murray jollytail

Biology
Inhabits stream margins over rock or sand bottoms, sometimes among aquatic vegetation. Still or gently flowing water on the margins of lakes, billabongs and streams. Usually swims in midwater over rock or sand bottoms, also in the vicinity of aquatic plants. Shoal forming (Ref. 44894). Feeds on a wide range of aquatic insects and crustaceans. Spawning has been recorded between August and September (Ref. 44894). Each spawning female releases 3,000-7,000 eggs which are slightly adhesive and settle to the bottom. Hatching in nine days at 9-14?C; newly hatched fry are 6-7 mm long.

Classification

Classified By

Klunzinger, 1872

Class

Ray-finned fishes (Actinopterygii)

Order

Smelts (Osmeriformes)

Family

Galaxiids (Galaxiidae)

Distribution

Region

Oceania

Distribution

Oceania: Murray River and tributaries in South Australia, Victoria and New South Wales, Australia. Has also been reported from several major tributaries of the eastern Murray system including Lachlan, Murrumbidgee, Loddon, Goulburn, Ovens and Mitta Mitta Rivers.

Range

33°S - 36°S

Environment

Climate

Temperate

Water Temperature From

10 °C

Water Temperature To

26 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; benthopelagic

Trophic Level

3.26 s.e. 0.40 Based on food items.

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

12.0 cm

Common Length

9.0 cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low vulnerability (16 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Vulnerable (VU) (A1c)