As of 3/28/20. Ferox will tame at the wrong level but once put in cryopod will correct to tamed level. A live 145 changed to 217 once in pod post tame. Also dododex is not accurate on x3 possibly x1. The same 145 took 20 element for full tame. At 5% per element.
You can find these guys at the bottom right of the green biome on gen 2 and use your exo suit helm to find them they should be outlined red then go on the beach (have element on your last slot) and use the element to feed it then fly up when it grows big then wait till it’s small again then feed it over and over again till tamed. bring at least 100 element to tame
These things are really easy to tame in genesis 2, the hardest part of taming is finding them. All you need to do is feed them element and hover above them just out of their attack range but not too high because they will in Agro on you and run away. Up if this helped:)