Eastern little galaxias (Galaxiella pusilla) fish species and information / pictures of Eastern little galaxias - Galaxiella pusilla

Eastern little galaxias (Galaxiella pusilla) fish species information

Scientific Name
Galaxiella pusilla

Common Name
Eastern little galaxias

Biology
Frequently found among vegetation along the edge of still or slow-running waters like swamps, drainage ditches and backwaters of creeks. Adults live in both ephemeral and permanent habitats. A short-lived fish, reaching maturity in the first year of life and perishing shortly after spawning. Fish occupying ephemeral water possibly aestivate or shelter in crayfish burrows when surface water evaporates during summer (Ref. 44894). Probably an annual species. Spawn from August to October. Like its southwestern relative G. munda, this species is also a multiple spawner (Ref. 44894). Females deposit a few eggs per day on leaf litter. Eggs hatch after 10-17 days at 16?-21?C. Scanty information on diet: captive specimens eat small invertebrates and filamentous algae.

Classification

Classified By
Mack, 1936
Class
Ray-finned fishes (Actinopterygii)
Order
Smelts (Osmeriformes)
Family
Galaxiids (Galaxiidae)

Distribution

Region
Oceania
Distribution
Oceania: Australia; coastal streams of Victoria from the Mitchell River or a little to the east, west to Mount Gambier in South Australia and south to the northeastern corner of Tasmania, including Flinders Island in Bass Strait.
Range
37°S - 42°S

Environment

Climate
Temperate
Water Temperature From
10 °C
Water Temperature To
30 °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
demersal
Environment
Freshwater; demersal
Trophic Level
3.17 s.e. 0.32 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
4.8 cm
Common Length
3.0 cm
Phylogenetic Diversity Index
PD50 = 0.6250 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Unknown
Vulnerability
Low vulnerability (10 of 100)
Resilience
Low, minimum population doubling time 4.5 - 14 years (tmax=1;tm=1;Fec=66)
Threat To Humans
  Harmless
IUCN Red List Status
  Vulnerable (VU) (B1+2bcd)