That long, torpedo-shaped body, upturned mouth, and explosive feeding strike make an arowana the centerpiece fish many monster-fish keepers want most. But before planning an eight-foot display or reserving a juvenile, ask the question that matters first: are arowanas legal to own? The answer depends entirely on which arowana species you mean, where you live, and how the fish entered the country.
For most U.S. hobbyists, silver arowanas, black arowanas, Jardini arowanas, and Australian spotted arowanas are commonly available and generally legal. The major exception is the Asian arowana. That fish has a very different legal status, and confusing it with other arowanas can create a serious problem.
Are Arowanas Legal to Own in the United States?
The word “arowana” covers several distinct fish. They may share the same prehistoric profile, but they do not share the same regulations.
Silver arowana (Osteoglossum bicirrhosum) is the familiar large South American species seen in many monster aquariums. Black arowana (Osteoglossum ferreirai) is another South American species, usually recognized by the striking dark coloration of juveniles. Jardini arowana (Scleropages jardinii) and Australian spotted arowana (Scleropages leichardti) come from Australia and New Guinea.
These species are generally legal to possess and purchase under federal law in the United States. That does not mean every buyer has a green light automatically. States, counties, and cities can impose their own rules on nonnative animals, imports, transport, or possession. A fish that is standard stock at a retailer in one state may be restricted somewhere else.
The fish most people are asking about when legality comes up is the Asian arowana, commonly sold internationally under names such as red arowana, golden arowana, crossback golden, and green arowana. This species is widely treated in the aquarium trade as Scleropages formosus and is heavily protected.
Why Asian Arowanas Are Different
Asian arowanas are protected under the Endangered Species Act and international wildlife-trade rules. They are listed on CITES Appendix I, the highest level of international trade protection for endangered species. Wild collection and commercial movement devastated populations long before the fish became a luxury symbol in parts of Asia.
Captive breeding does not make an Asian arowana a normal pet-store fish in the United States. While licensed facilities and certain scientific, conservation, or exhibition situations may qualify for tightly controlled permits, that is not the same as routine hobbyist ownership or retail sales.
For the average U.S. fishkeeper, there is no ordinary legal path to import, buy, sell, or ship an Asian arowana. Interstate commercial movement is especially problematic under federal law. A seller claiming that a fish is “farm bred,” “microchipped,” or accompanied by foreign paperwork does not automatically make possession or a sale lawful in the U.S.
This is where collectors should slow down. Asian arowanas can command high prices, and rare-fish demand attracts mislabeled livestock, incomplete paperwork, and sellers who use vague names to avoid saying exactly what they have. If a deal feels unusually secretive, cash-only, or too good to be true, walk away.
Legal Ownership Depends on More Than Federal Rules
Federal status is the first checkpoint, not the final one. Even with a species that is federally legal, local rules can matter.
Some states regulate nonnative fish because of invasive-species risk. Others restrict transport across their borders, require permits for certain aquatic animals, or prohibit species that could threaten native waters if released. Hawaii, for example, has particularly strict rules for importing and possessing freshwater species. Local ordinances may also affect what can be kept in a residence, apartment building, commercial space, or public display.
Rules change, and online forum posts can stay visible for years after regulations have been updated. Before purchasing any arowana, verify the current requirements with your state fish and wildlife agency. If you live in a city with separate animal codes, check those as well. This is particularly worthwhile when ordering a fish online, since shipping across state lines adds another layer to the transaction.
Keep your invoice and species identification after purchase. A proper record should identify the fish accurately, ideally with both its common and scientific name. “Arowana” alone is not specific enough when legal status differs so sharply among species.
Do Not Rely on Color Names Alone
Color labels can be misleading. “Red dragon,” “golden dragon,” and “crossback” almost always point toward Asian arowana varieties, while “silver,” “black,” and “Jardini” usually identify species commonly kept by U.S. hobbyists. Usually is not always.
Ask the seller for the scientific name before you buy. A knowledgeable retailer should be able to tell you whether the fish is Osteoglossum bicirrhosum, Osteoglossum ferreirai, Scleropages jardinii, or another clearly identified species. Accurate labeling protects the buyer, supports responsible trade, and helps you prepare for the fish’s adult behavior.
A Legal Arowana Still Needs a Serious Tank
Legality is only one part of the decision. Arowanas are not decorative fish for a standard community aquarium. Their size, speed, appetite, and jumping ability make them a commitment from day one.
A silver arowana can exceed three feet as an adult. A small juvenile may look manageable in a store tank, but it can grow rapidly with warm, clean water and heavy feeding. For a long-term adult silver arowana, think in terms of a very large aquarium with substantial length and width, often 250 gallons or more as a starting point. Bigger dimensions are better than simply adding height. This fish needs room to cruise, turn, and feed naturally at the surface.
Arowanas are also elite jumpers. A secure, weighted lid is not optional. They can launch through tiny openings during feeding, after a sudden light change, or when startled by activity around the tank. Open-top aquariums look fantastic, but they are a poor match for this species.
Filtration must match the bioload. These are large predatory fish that eat heavily and produce substantial waste. Oversized filtration, regular water changes, strong oxygenation, and a consistent maintenance schedule are what keep an arowana display clear and stable. An impressive fish in cloudy water is not a monster tank success story.
Tankmates Require a Plan
Arowanas can coexist with other large fish, but compatibility is never guaranteed. Tankmates must be too large to swallow, able to handle the same water conditions, and not prone to nipping long fins or competing constantly at the surface.
Silver arowanas are often less confrontational than Jardinis, but they are still predators. Jardini arowanas can be notably territorial and may become aggressive toward tankmates as they mature. Large catfish, datnoids, severums, certain cichlids, and other carefully selected species may work in the right oversized system, but each mix needs observation, backup space, and a willingness to separate fish if behavior changes.
Do not buy an arowana based on a temporary store-tank pairing. Juvenile fish can appear peaceful together for months before size, hormones, territory, and feeding competition rewrite the entire setup.
Buying Responsibly From the Start
When shopping for a legal arowana, choose a seller that identifies livestock precisely and can answer practical questions about origin, diet, size, and temperament. Healthy juveniles should be alert, hold themselves level in the water, show clean eyes and fins, and respond to movement or food. Avoid fish with persistent surface gasping, visible injuries, sunken bodies, cloudy eyes, or clamped fins.
Plan the tank before the fish arrives. Have the aquarium fully cycled, covered, heated appropriately, and filtered for the adult fish you intend to keep, not just the juvenile you are bringing home. Quarantine is smart whenever possible, especially before adding a new predator to an established large-fish system.
Most importantly, never release an unwanted fish. Arowanas are not native to U.S. waterways, and releasing any aquarium fish is irresponsible and may be illegal. If your circumstances change, contact a qualified retailer, aquarium club, or experienced hobbyist about ethical rehoming options.
A legal silver, black, or Jardini arowana can become the living centerpiece of an unforgettable freshwater display. Start with correct species identification, confirm your local rules, and build the space and maintenance routine this remarkable fish deserves. That is how a collector’s dream stays exciting for years instead of becoming a costly mistake.