John Warn is a serious amateur underwater photographer. He has completed nearly 600 photo dives in Cozumel, Galapagos Islands, Hawaii, Papua New Guinea, Costa Rica, Cayman Islands, Roatan, Cayos Cochinos, Palau, Chuuk, Revillagegedos Islands, Cay Sal Bank, Similan Islands, Lembeh Strait, Solomon Islands and Fiji (where he has participated in 180 dives). He and his wife reside in Morrison, Colorado and Savusavu, Fiji.