The snake as shown in the picture was confirmed by first designer, but never by Stan. He actually was interested in to have snake but not until King of Agar.io became developer.
A Snake was sighted in a sneak peak video by King of Agar.io which was not accidental. The video in which the "Green" snake was seen was actually recording during the time when King was working on the snakes.
This snake was never planned to be part of the game due to lack of design compatibility in Mope.io. However, when Stan wanted King to develop Snakes, then King started to work on the design ideas. He sketched a coiled snake that he did not know Stan actually wanted. At the same time, King had new designer, Slug, work on this new snake design for days and finally, they produced the Cobra and Boa Constrictor.
- KOA has never played as it ever in a video, but it has been seen in his edible animals bar and once in the Boa Constrictor teaser in the upgrade tree called "Hippo", alongside an unknown animal and Loch Ness Monster at 1:16.
- This is the only animal to be scrapped.