Price on InquiryPossibly one of the coolest freshwater fish to have in your aquarium, the silver arowana is a staple fish for large tank systems. These monster fish can easily surpass 3 feet (92 cm) in length, live up to 20 years, and have a giant mouth that can easily suck in smaller fish and invertebrates. Though silver arowanas are usually sold as juveniles, it is important to understand the true mature size, lifespan, and dietary needs of this species of fish. Keep reading to find out everything you need to know about silver arowana care and possibly keeping one of these fish in your own freshwater aquarium