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Adult size + growth rate
How big does a Arowana get?
TL;DR Silver arowana grow 36-48 inches. Asian arowana (red, golden) reach 30-36 inches. Black arowana 24-32 inches. ALL arowana need 180+ gallon tanks at adult size.
Growth timeline Stage Size Juvenile 4-6 inches (purchase) One Year 14-18 inches Three Years 24-30 inches Adult 30-48 inches (silver largest)
Factors that affect maximum size Tank size: severely stunted under 180g Tight-fitting lid (jumpers) High-protein diet: shrimp, crickets, pellets Species (silver vs Asian vs black) Tank size requirement 180+ gallon minimum, 240g+ ideal
Full Arowana care guide Browse the full Arowana care guide for water parameters, diet, tankmates, and breeding details. Use the stocking calculator to plan around adult size, not juvenile size.