The red-tailed boa is 1.8-3 meters long and weighs 10-15 kilograms. The female is larger. Individual captive anaconda shells grow to 3.7 meters and weigh 45 kilograms.

red-tailed boa The tail is quite strong and can hold things tightly. The head has no thermal-sensing cheek sockets. In terms of body color, the body of the red-tailed boa is mostly red or brown, and the tail is brick red. The back is dominated by brownish-yellow markings, and the tail markings are lighter. Nowadays, red anaconda has many body color manifestations under artificial cultivation, such as: albino, salmon color.