Jason's Nudibranch (Jason mirabilis) at Groper Rock (Tatapihi) in the Mokohinau (Pokohinau) Island group, Hauraki Gulf, New Zealand..Saturday 17 October 2009 .Photograph Richard Robinson © 2009..Dive Number 189.Boat : Apollo, Goat Island Dive..Site : Groper Rock (Tatapihi) in the Mokohinau (Pokohinau) Island group..Max Depth 28 m..Temp 19c. O2 32%.Bottom Time 56 min..Bottom Time to Date 9600 min..Cumulative Time 9656 min.