14K views · 557 reactions | Onassis checking out the two new arapaima fish. RIght now they are about 4-feet but full grown, arapaima can reach sizes of 10-feet! Look for them in the Aquarium and Reptile building by spotting their striking red tails. | Milwaukee County Zoo | Facebook

23K views · 450 reactions | Arapaima  What is This SIZE? This river giant can grow longer than a human. It breathes air and explodes to the surface without warning. #wildlife #nature #animalfacts #1minuteanimals | 1 Minute Animals | Facebook

The Arapaima is a MASSIVE fish, which can — in the wild — reach lengths of up to 15 feet. This size poses a particular challenge to our aquarists, who need to provide veterinary care or assess their physical wellbeing. For several years, we've been training our five Arapaima to voluntarily swim onto a submerged stretcher that can be used to lift them out of the water for examinations, if need be. Recently, this process reached a new stage, and we're now working to make them comfortable with bein