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This profile was written by Marl L.
an active contributor to
This is a harmless, very peaceful and color-changing fish. It is imported
rarely to the states and can be difficult to find. Don't pass up the
chance to get a school.
Listed tank sizes are the minimum
|| Up to 2" (5cm)
|| Min. Tank requirements: 24 inches
|| Middle - top
|| PH recommendation 5.0-7.5
|| Soft to medium. dH range: 0-18
||73°F to 81°F (23°-27° C)
South America: Amazon, Essequibo, Orinoco, and Tocantins River basins.
General Body Form:
Very long and 'slender'
The bottom of the eye is very blue and the top is yellow. All fins are
transparent with the exception of the caudal fin that changes color
to and from a blue or yellow tint with a spot of black fading to the
edges. The body is transparent. The Caudal peduncle is color changing
to and from bright yellow and orange. A color-changing stripe extends
laterally from the gill cover to the bright spot on the tail. The color
of this stripe depends on the angle of light and fish direction and
can be yellow, green, blue or orange. It also has a nearly parallel
stripe extending from the anal fin to the caudal peduncle with the same
characteristics. This fish changes color back and forth in a matter
of seconds. The most commonly sold in the US are silver/grey bodies
with black stripes along it's back and flanks. .
This is an easily kept fish. With little time in the aquarium, this
fish has not shown any aggression towards any other fish except it's
own with no visible or damaging affects. Feeding is no problem. They
accept all types of flake or pellet food. They also relish on frozen
foods and thrive live brine shrimp. They will pick at plants such as
Hornwort. The top of the tank should have plenty of swimming room, as
they like are constantly on the move. When calm they will stop under
leaves or floating plants. They completely resist going below the middle
of the tank. They won't even zip down for food. They should be kept
in schools of no less than six.
Fast flowing streams and creeks in it's home range.
Mostly unknown, sex is also unknown.