Copyright www. It is also known as the Twospot Astyanax and is still comparatively uncommon among aquarists. The name Twospot Astyanax is derived from the two black spots found on this fish. One is located at the shoulder and one is found at the caudal peduncle. It lives in a rich assortment of different habitats, from clear rivers to drainage ditches.
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Click here to find the heater we recommend for an aquarium of this size. As this is a large aquarium, you may need more than one of these. To search for other high quality aquarium heaters in your area, click here. Diet Unfussy and omnivorous? Live and frozen foods should be offered regularly in captivity, but good quality dried products should suffice for much of the staple diet. To find high quality fish foods, click here.
In larger aquaria it could make an interesting alternative to the more commonly seen disc characins of the genera Metynnis and Myleus. Sexual Dimorphism Females are noticeably round in the belly when full of eggs and a little less colourful than males.
Reproduction The most success is reported by using a ratio of males to females. Little or no lighting is required but add some bunches of fine-leaved plants such as Cabomba or Java moss to act as spawning medium. An air-driven sponge filter can also be installed.
The fish themselves are best conditioned in a separate tank with lots of live foods. Once the females are plump with eggs, add one female and a couple of males to the spawning tank. Spawning usually occurs the following morning with a single female capable of producing several thousand eggs. These hatch in around 24 hours and the fry may become free swimming as little as 12 hours later. Begin feeding with newly hatched Artemia from this point, introducing powdered dried foods later if you wish.
Growth is fairly rapid provided regular water changes are carried out.
Two Spot Astyanax
Zygogaster Eigenmann, Astyanax is a genus of freshwater fish in the family Characidae of the order Characiformes. Some of these fish, like many of their relatives, are kept as aquarium pets and known collectively as tetras. With around described species and new ones being described yearly,  this genus is among the largest of the entire order; Hyphessobrycon also has more than species and which one is larger at any one time depends on whether more species have been recently described in one or the other. The blind and colorless cave tetra of Mexico is a famous member of the genus, but its taxonomic position is disputed: Some recognize it as part of the Mexican tetra A. The generic name comes from Astyanax , a character in Greek mythology , who was the son of Hector of Troy ; in homage to this, several specific epithets also refer to the Iliad.
A The zoology of the voyage of H. Beagle, under the command of Captain Fitzroy, R. Londres : Smith, Elder, and Co. Issued in 4 parts. On new reptiles and fishes from Mexico. Fishes of the Yucatan Peninsula. Carnegie Inst.