Black Arowana

Black Arowana (osteoglossum ferreirai) have been alluded to as “living fossils,” since they’ve changed very little throughout the last 150 million years. They’re local to the Rio Negro Bowl in South America, where they reside in both high contrast water. These enormous hunters can reach up to 40 creeps long, albeit generally kept in a home aquarium will just stretch around 30 inches.