FeaturedPrice on InquiryThe Arapaima (Arapaima gigas) is one of the largest freshwater fish in the world, capable of growing over 10 feet long. This prehistoric living fossil is a true monster fish and the ultimate trophy for serious aquarists with massive setups. Arapaima are air-breathers, surfacing periodically to gulp air with a distinctive whooshing sound. Their massive armored scales and primitive appearance make them a conversation piece like no other.