At first this was not its own archetype, but instead bunched together with Lestree Zoo as just zoo. But we decided to split zoo into two different archetypes as they play out quite differently. The white zoo deck is a little more controlling than the more classic Lestree Zoo which focuses all its energy on killing your opponent as fast as possible. The deck is focused in white and green but often splash blue for power, Serendib Efreet and Psionic Blast. It can also play red but then it’s more often built like a Lestree Zoo.
The thing that makes it a zoo deck is that this deck also is built around a bunch of aggressive mana efficient creatures. White gives this deck access to Savannah Lions which means that you can play eight two power 1-drops together with Kird Ape or that you at least have a powerful 1-drop if you want to cut red completely. Other creatures you can use in the more aggressive builds are Argothian Pixies, Elvish Archer and Serendib Efreet but it’s also possible to add some more expensive creatures like Erhnam Djinn and even one or two Serra angel.
The thing that sets this deck apart from Lestree Zoo and Arabian Aggro is the use of white’s efficient removal in the form of Disenchant and Swords to Plowshares. These cards allow the deck to answer most of what the opponent does at the same time as you’re are hitting him or her with your creatures. But as these cards often take the space otherwise occupied by burn and because of the life Swords to Plowshares gives your opponent the deck become a lot less aggressive even if its still considered an aggro deck.