This profile was written by Lizon an active contributor to the site.


Aphyocharax rathbuni


    A great schooling fish of six or more. A hardy fish but known fin nipper to fish with long flowing fins.

Quick stats:

Listed tank sizes are the minimum
Size: 1+ in (2.7 cm)
Tank: 15 Gallons for a singles species tank with a nice school.
Strata: Will go everywhere but predominantly Lower to Middle level.
PH: 6.0 – 7.5
Hardness: Soft to medium: dh range 2.0 – 20.0
Temperature: 68°F to 79°F (20°-26° C)


Order: Characiformes
Family: Characidae
Subfamily: Aphyocharacinae
Genera: Aphyocharax
Species: rathbuni

Common name:


Green Fire Tetra

    , Redflank bloodfin, Rathbun’s Bloodfin


    South America: Paraguay River basin.

General Body Form:

    A slender fish somewhat spindle shaped with little lateral compression. The belly area seems to be rounded in the females and concave in the males. They can reach a length of about one and one quarter inches (2.7cm)

Sexing & Colouration:

    Males have the white tips on anal, pelvic and dorsal fins, the females do not. Over all body color is almost metallic light green with a metallic yellow streak followed by the red splash on the pelvic fin and tail.


    A hardy planted tank is good, low lighting and they do prefer more acidic waters. Lots of hiding places for these fish as well. The just like other tetras will take all foods offered, side treats the brine shrimp and blood worms. These are a shoaling fish, schools should be a minimum of 6. These can be placed with other community fish provided no long flowing fins, these fish been known to nip fins, and should not be housed with any predatory fish.


    In the aquarium they will eat most anything offered to them. Such as, Daphnia, freeze dried blood worms, Brine shrimp as well as flakes and granules.


    Hard to breed though increasing the numbers in the tank can help up the chances for eggs and higher chance fry will develop, also feeding them live foods can help condition them. No light when breeding and tank should have many thin leafed plants for egg laying. Generally these will spawn during the day and eggs hatch within three days, feed the fry Infusoria and baby brine shrimp, newly hatched.



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