Groper is also known as Eastern Blue, Brown Groper, Red groper and Eastern Blue Groper.
The scientific name for Gropers is Achoerodus viridis
Within Australia there are two types of Gropers. The Eastern and the Western species. Blue Gropers have an interesting life cycle. They all start up life as females and later in life they undergo sexual transition to become males.
All the brilliant big blue fish you see are males and smaller brown/green fish are females. Australia has some tight regulations regarding catching and targeting Blue groper and exclusion zones where you can't target them, and a minimum and a maximum size limit. Make sure you check your local regulations before you go out and target these fish!
There's not many species of fish that will bury you quicker then a big blue Groper. They are a big powerful fish and live right in next to the reef and in caves, so as soon as they take the bait, they generally turn and go right back into their home. So you need strong, reliable tackle to be able to turn their head as soon as you set the hook.