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Following is a list of regular Sport Diving contributors.

	Kelvin Aitkenis a Melbourne-based professional photographer and diver with passion for the big blue and the big sea creatures to be found out there. He’s dived from the Arctic to the extremes of the South Pacific, as well as the southeastern Australian continental shelf where he photographed shark species nobody knew were out there. Kelvin is a BBC Wildlife Photographer of the Year marine category winner and you can explore his unique work at marinethemes.com
	Gary Brennand began diving in 1983 in Western Australia and studied part-time to become an Instructor while working as an IT (computer) manager. He recently became a PADI Course Director. In 2005 he moved to Cairns, Queensland, Australia. He started underwater photography in 2001 and uses a Nikon Coolpix 5000 with a YS90dx strobe and a housed Nikon D200 SLR. Gary has dived extensively worldwide. Number of Dives: 3000+ Gary’s photography is on marinedomaindiving.com
	Andrew Chin began diving in the early 1990s, kick-starting a career in marine biology. After university he was a biologist on Heron Island before joining the Research and Monitoring team at the Great Barrier Reef Marine Park Authority. As a commercial and scientific diver, Andrew has dived in harbours to monitor environmental effects of dredging plus assessing the damage caused to the reef by Cyclone Larry. He also works closely with tourism industry staff through the Eye on the Reef project to tap into their vast wealth of knowledge. Specializing in sharks and rays led to a Churchill Fellowship in shark research and conservation, to Florida to tag sawfish in the Everglades, and photographing fish markets in Asia. He's a founding member of the Oceania Chondrichthyan Society - the region's first professional society for research and conservation of sharks, rays, skates and chimeras. Andrew has several scientific publications including chapters of the State of the Great Barrier Reef Report and Climate change and the Great Barrier Reef. More at oceaniasharks.org.au & eyeonthereef.com.au
	Ken Hoppen A full time marine wildlife photographer who has travelled and dived extensively around Australia, Asia and the South Pacific. Though generally photographing ‘big things that move’, he is also known to peer into the many underwater cracks and crevasses in search of small, interesting critters. He is based in Melbourne, Australia, and regularly dives the southern Australian coastline in search of interesting new creatures and areas. He was a finalist in the Veolia Environment Wildlife Photographer of the Year Competition in the Portrait Section for 2010, and has regularly been a semi-finalist with his photos. After thousands of dives he still gets a buzz out of seeing new things!
	Glen Cowans was born in Western Australia and began photographing underwater in 1995 and won The Australasian Underwater Photographer of the Year Award in the Novice Category in 1998. Late 2004, his wife Louise, enthusiastic dive buddy and underwater videographer, persuaded Glen exhibit works showcasing his passion and unique style of underwater photography. In March 2005 the Western Australian Maritime Museum held a 10-week exhibition, after which he decided to devote his career to underwater photography. Visit glencowans.com
	Ariel Fuchs is a marine biologist who graduated with a PhD on kelp before specializing in field work and scientific missions in the Antarctic regions. He then focused on the ocean’s dynamics and interactions of the great oceanic currents, the climate and the history of animal and human settlement, especially around islands. A professional diver and naturalist, he believes photography and television are crucial to educating a large audience to the need for better protection and preservation of natural resources.
	Bob & Dinah Halstead Bob began diving in the Bahamas in 1968, became a NAUI instructor in 1970 and, with his wife Dinah formed Papua New Guinea's first full time sportdiving business in 1977. In 1986 they started the first PNG liveaboard boat operation, Telita Cruises. Bob and Dinah have explored all Papua New Guinea coastal regions underwater and still do. Bob has a razor fish species named for him, Xyrichtys halsteadi, has published eight books on diving and marine life and hundreds of articles. Dinah’s goby is Lubricogobius dinah and sand diver Trichonotus halstead was named in honour of both Bob and Dinah. More at halsteaddiving.com
	Richard "Harry" Harris is a passionate rebreather, cave and wreck diver who started diving in 1979 at Adelaide Skindiving Centre. He began taking photos with a Nikonos III, developing his black and white prints in his father's wine cellar! In recent years his photography has focused on wrecks and caves of Australasia, but his work as an anaesthetist and diving medicine doctor has led him to work and dive in the UK, New Zealand and Vanuatu. Mixed gas rebreather diving opened up a new world of photography and exploration for him including the deep wrecks of the New South Wales coast, cave diving in Australia's Kimberley region, and reef walls of Vanuatu. His images and published works are at divedoc.net
	Roger Harvey is a freelance cartoonist based in Sydney, Australia. His unique perceptions of the marine world have appeared in Germany's Unterwasser, Asian Diver, Dive Log Australasia and Sportdiving Magazine. He says he got hooked on snorkeling at the age of six, and has been poking around underwater ever since. Check out what Roger's been up to on rogerharvey.net
	Pierre Larue began diving on the Moroccan Atlantic coast in 1956. An International 2 star Diving Instructor, he dived the Méditerranean and French Indies before settling in New Caledonia 39 years ago with wife Monique and son Frank. Now retired, he’s specialized in underwater photography since 1962 and is a member of Fortunes de Mer Caledoniennes and Association Salomon. He went on the four latest Solomon Islands missions (wrecks of the 1788 Laperouse expedition). Author of Plonger en Nouvelle Calédonie, he’s also contributed to dive magazines worldwide, including Sportdiving (Australia). Awards: First Prize, underwater reports category, 29th Festival Mondial de l’Image sous-marine d’Antibes 200; the press Palme d’Or: Palmes et Plumes, 6ème Salon de la Plongée de Paris 2004.
	Nigel Marsh & Helen Rose are Australian photojournalist based in Brisbane, Queensland. The couple are married and have enjoyed many dive adventures around Australia, Asia and the Pacific. Nigel has also co-authored two diving guide books with Neville Coleman, including the very popular Diving Australia. For more visit nigelmarshphotography.com
	Jeff Mullins has explored the seas of Australia, South-East Asia & the South Pacific for 36 years. He began underwater photography in 1976 and has since been published worldwide. Jeff won the PADI Hallmark of Excellence Award for Outstanding Contribution to Photo Journalism in 1995. A regular Sportdiving Magazine contributor, his first article was published in 1979. Jeff and wife Dawn run dive tours and digital underwater imaging courses from their home near Tulamben in Bali for individuals or small groups. Their guide to Tulamben's dive sites and marine life is titled Reef Wreck & Critter. More at reefwreckandcritter.com.
	Markus Roth Born in September 1976, Markus Roth’s passion for photography reaches all the way back to his childhood. The son of the well-known sports photographer Hans-Alfred Roth has learned in his early childhood how fascinating it is to captivate special moments on film or memory chip. He has been addicted to the underwater world since 2004. Thus, next to his wife, Judith; his camera has been his constant companion. Apart from local waters, the main international dive sites Markus Roth has visited so far are the Maldives, Philippines, Lembeh Strait, Weda Bay in East Halmahera, Cenderawashi Bay & Raja Ampat in West Papua. He really likes extraordinary remote places like Cenderawasih Bay or Weda Bay. Being the first diver at a reef has become an obsession for him. His pictures and articles have been published in magazines and newspapers world wide. Just to name a few: EZ-Dive Magazine, Asian Diver, Diver, Sport Diving (Australia), Dive Pacific, Niugini Blue, Divemaster, Wielki Blekit and The Dive Site. More here.
	John Silberberg is a Master Mariner who spends his life on, under and by the sea, lives with wife Sandra and two daughters on Tasmania's east coast, Australia. In 2005 he began underwater photography and writing about his diving experiences. His favourite diving is amongst the deep sponges off Bicheno. He loves combining photography with diving and the satisfaction of a dive well done. John gratefully acknowledges the support of Sea Optics seaoptics.com.au and recommends this as the first stop for honest, professional advice about underwater photography.
	Don Silcock grew up in northwest England but left for warmer climes as soon as he could. He started diving in Malta in 1978 and qualified as a BSAC Advanced Instructor and PADI Divemaster in 1987, but now spends his free time on underwater photography. He lived and worked in the Middle East for 14 years before moving to Australia in 1991. Don works for a major US corporation and travels extensively in Asia, which allows him to check out the diving before planning a major trip! His main focus is the incredible biodiversity of Papua New Guinea and Indonesia and he does at least one major trip to each every year. His articles and images are designed to help other divers source destinations. More info is on indopacificimages.com
	Richard Smith As a child, British-born Richard, was enthralled by the ocean and its inhabitants. This passion led to his completing a degree in marine studies. In search of warmer seas he moved to Australia where he completed a masters degree in marine ecology and evolution. He now studies for a PhD on the social behaviour and ecology of the pygmy seahorse, Hippocampus denise. Richard has been diving since 1997 and has travelled the world photographing and studying the ocean realm. His work and images are on www.OceanRealmImages.com
	Mark Strickland His life-long interest in the sea includes over 10,000 dives and careers as a lifeguard, boat captain and scuba instructor. He's dived most top regions, and spent 17 years in Thailand as Cruise Director/Photo-Pro on liveaboards, including state-of-the-art Ocean Rover. He now leads several dive trips yearly from California to favourite spots. Mark has found several nudibranch species, including Reticulidia suzanneae, named for his wife Suzanne, and his own Halgerda stricklandi. Mark's photos and articles have appeared worldwide in major magazines and books, including Sportdiving Magazine. Mark's photo library is at oceanic-impressions.com
	Richard & Joanne Swann For many years they owned and managed Downbelow Dive School UK. As PADI dive professionals, Master Instructor and Staff Instructor they're actively involved in the diving industry on many levels. Their diving careers provide global travel opportunities and after many months spent visiting Sabah in Borneo they decided to settle there and now live in Kota Kinabalu, where they own and run a 5 Star PADI Dive Centre, Downbelow Marine and Wildlife Adventures. Much of their time is now spent on marine and wildlife photography on the island of Borneo. This husband and wife team are at www.downbelow.co.uk
	Lyndon & Emma Turner These South Australians love tropical diving, but are also staunch advocates of temperate water and regularly dive the many Yorke Peninsula coastal jetties. They want to raise awareness of the unique marine life and biodiversity of South Australian coastal waters. Emma started diving in 1996 and has dived in NSW, Tas, QLD, PNG, and Solomon Islands. Lyndon started spearfishing with Mt Gambier Spearfishing and Skindiving Club in 1976 and graduated to scuba in 1979. He’s dived worldwide but PNG, Indonesia and the Solomons are his overseas favourites. Lyndon and Emma still shoot film with Nikon F100s and F5 cameras in Subal housings with an array of Sea & Sea YS-30, YS-120 and Nikon SB-105 strobes. Their Nikon D80 is used above water.
	Paul Walden Born and bred in Stockholm, Sweden, Paul spent his childhood reading books by Ron and Valerie Taylor and dreaming of southern latitudes. Oddly, his early snorkelling experiences in the freezing the northern Atlantic and Baltic Sea spurred him on. After taking up diving in the Maldives in 1988, he explored the Mediterranean Sea and the Atlantic, Pacific and Indian Oceans before going pro as a PADI instructor in 1995. In 2003, he moved from Sweden to Australia. Initially working as a copywriter in Cairns, he's since shifted his focus to freelance writing and photography, with a specialty in nature and wildlife. Photo courtesy Calypso Productions
	Alan 'Wiggsy' Wiggs has been diving since 1977. He completed his FAUI C-Card certification while at Monash University at the grand cost of $45, and dived in Fenzy vests, stiff Abalone Vulcan wetsuits, black rubber fins plus big scary dive knives. His imaging began with an Olympus Trip 35mm in an Ikelite housing with a bulb flash that never worked twice in a row! He's now digital with an Olympus C5000z and Inon strobe. “My first article with the world’s best dive magazine was last century when Sportdiving was known as S.I.A. I was surprised that my Port Phillip Bay piece was published, and have written nearly 30 articles since, mostly for Sportdiving. My favourites include Palau, Maldives, Naigani Island and Beqa Island, Fiji. Best dive - Palau’s Blue Corner. Favourite diving at home - Flinders-Cape Schanck coast, exploratory dives in Bass Strait. (Image: Alan Wiggs at Bokissa Island Vanuatu with daughter Georgia).
	Stephen Wong & Takako Uno Full time husband and wife marine photojournalists since 1997, Stephen & Takako are based in Hong Kong. They've traveled the globe, including the Arctic Circle and the tip of Argentina. Stephen & Takako’s works have appeared in over 30 photo exhibitions and in marine and wildlife journals. They've been awarded in dozens of photo comps, including four times in the BBC Wildlife event. Takako discovered a new species of nudibranch, Takako’s Trapania, and photographed new species of snapping shrimp and octopus. Their images have appeared in many books, including Sipadan-Mabul Islands, Celebrate the Sea, and An Ocean Odyssey, their 240-page pictorial anthology. stephenwong.com & takakouno.com