Are Groupers Social Fish?

Are Groupers Social Fish? They are slow to mature and have complex social systems that provide cues for sex change. Can groupers be aggressive? https://www.youtube.com/watch?v=USdgJZOzXbw” data-ni=”1′′ jsdata=”XZxcdf;exs7dHuwWHdiqM;A6iHx8′′ data-ved=”2ahUKEwiFnJ7nvZT3AhUWfN4KHVcfClgQzkx6BAggEAA”>