In The Aquarium
Arowanas are solitary fish and only appreciate company while young; adults may show dominance and aggression. Some compatible species often partnered with this fish are clown knifefish, pacu, oscars, plecostomus, jaguar cichlids, green terrors, gar, tinfoil barb, siamese tigerfish (datnioides microlepis) and any other semi-aggressive fish that cannot fit in the arowana's mouth.
These fishes are best kept with live or frozen feed and they easily outgrow the tank within a span of 8–10 months. A large type aquarium of at least 150 gallons is preferable.
Australian species are best kept alone in aquaria.
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