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Rainbow Copella

Copella vilmae

A jewel-toned splash of color from the blackwater streams of the upper Amazon.

Rainbow Copella
AI-generated illustration
© Google Gemini 2.5 Flash Image · AI-generated

About

The Rainbow Copella (Copella vilmae) is a small, slender characid from the blackwater and clearwater streams of the upper Amazon basin in South America. Males are the showier of the two sexes, dressed in warm reddish-orange and gold tones with iridescent scales that catch the light differently depending on the angle. A subtle but genuinely attractive display. Females are plainer and a touch smaller, as is common in the genus. In the wild, these fish inhabit soft, acidic waters with low mineral content, often stained brown by decomposing plant matter, and replicating those conditions in the aquarium is really the key to keeping them well. That means soft, acidic water is non-negotiable here. This isn't a species you can fudge the chemistry on, which is why it's best suited to someone who already has experience dialing in blackwater conditions. Given the right setup, they're peaceful, active little fish that do well in groups and spend most of their time in the mid and upper water column. A well-planted tank with dim lighting and some surface cover suits them nicely. Feed a varied diet of small live, frozen, and prepared foods and they'll reward you with good color and relaxed, natural behavior.

Frequently asked questions

How big does the Rainbow Copella get?
The Rainbow Copella reaches about 1.5–2" as an adult.
What size tank does the Rainbow Copella need?
A minimum of 15 gallons is recommended for the Rainbow Copella, with more room needed for a proper group.
What water parameters does the Rainbow Copella need?
The Rainbow Copella does best with a temperature of 73–77°F, a pH of 4.5–5.2, hardness around 2–5 dGH.
Is the Rainbow Copella aggressive?
The Rainbow Copella is generally peaceful and suits a community tank with similarly calm tankmates.
What does the Rainbow Copella eat?
The Rainbow Copella is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
How long does the Rainbow Copella live?
With good care, the Rainbow Copella typically lives 3-5 years.