The Blue Groper is not a real 'Groper' as such but it is part of the Wrasses family. The Blue Groper is usually found on exposed reefs from about 0-40m deep. They range from Wilsons Promontory in Victoria up the east coast to around Hervey Bay Queensland. At most dive sites in Sydney, the banging of two rocks together will usually attract a Blue Groper (he thinks you are getting him something to eat!).
The Blue Groper male is the big blue fish that we all know and regularly see. The males also have orange coloured lines radiating out around their eyes. Look closely next time you see a Blue Groper while diving and see if you can notice the lines. The females are smaller and range from a brown colour to a reddish brown; they may also have a series of pale blotches along the side of their body. Juveniles start out as a green colour and then change to the brown of the female. Apart from colour the fish also has very large lips. The fish grows the max size of about 1m.
Blue Groper love sea urchins, as most people would know. Please do not kill sea urchins to feed to the Blue Groper, no matter how tempting it may be. The sea urchins have their place in the reef ecosystem too. If you are tempted to feed them Akos Lumnitzer in his article on Blue Groper in the June/July edition of Sport Diving Magazine recommends boiled eggs and beach worms from the local tackle shop. Remember to watch your fingers if you try this. Apart from urchins their diet also consist of small crustaceans.