Forest Octoroks are enemies in Breath of the Wild.
Hyrule Compendium Entry
Forest Octoroks are a type of Octorok that lives in forests. They hide undergroud disguised as shrubbery, jumping out if close enough. If Link is spotted, they will spit rocks at him from afar. These can be deflected by a performing a Perfect Guard, defeating the Forest Octorok in the process. If their shrubbery is cut, they will pop out of the ground confused, leaving themselves open for an attack.