Twospot astyanax (Astyanax bimaculatus)

Scientific name: Astyanax bimaculatus Linnaeus, 1758

The Twospot astyanax (Astyanax bimaculatus) is a freshwater fish of the family Characidae. In the aquarium it needs water at 20–28°C (68–82°F). Native range: South America, Panama to the Amazon basin.

Twospot astyanax care at a glance

Temperature: 20–28°C (68–82°F)

Biology

Inhabits large free flowing clear rivers, small streams, drainage ditches and artificial ponds and impoundments. Feeds on zooplankton, detritus, higher plants and sometimes on the scales of fish. Gametogenesis takes place during the dry season in time for reproduction to begin during the rainy season. Reproduction could be carried out in captivity.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name: Astyanax bimaculatus
Family: Characidae (Characins)
Order: Characiformes (Characins)
Class: Actinopterygii (Ray-finned fishes)
Maximum length: 17.5
Environment: Freshwater;; pH range: 5.5 - 7.5; dH range: ? - 25 benthopelagic; potamodromous
Climate: Subtropical
Distribution: South America: Panama to the Amazon basin.
Conservation status (IUCN): Not Evaluated
Threat to humans: Harmless
Uses: Fisheries: of no interest; aquarium: commercial
Resilience: High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)