Cotton Slimes have been observed occasionally wiggling - in a similar fashion to a Tabby Slime performing a pounce - and then hopping more quickly in a straight line in whichever direction they are going - even if they are not facing the same direction - for a few seconds.
It is the veggie-eater of the trio of "starter slimes", therefore its behavior is going to be more simplistic and is going to be one of the more common slimes in Slime Rancher 2.
The slime's name and overall appearance may be based on the Cottontail Rabbit.
- https://twitter.com/NickPopovich/status/1404172285217370112 - Nick confirms the names of the Cotton, Angler, Flutter, and Batty Slimes.
- https://twitter.com/NickPopovich/status/1405401562122362881 - Nick posts a video and then confirms their behavior by a user on Twitter
- https://www.twitch.tv/videos/1103031434?t=0h23m18s - Nick explains how Cotton Slimes will behave on Twitch.