The incident occurred a few years ago, but Mark has been chatting to WA Today about it and the challenges of his career.
He said: "It came right for me and had a look." He said he lay on the sea bed at one point and that luckily the shark swam away.
During his career diving for abalone off WA's south coast, he had lost a colleague to shark attack and has also had to use his motorised cage to charge at a shark circling him and preventing him from surfacing for air.
He says it takes a "certain type of person to work as an abalone diver", and that he always works with a shark shield and shark cage for the moments when a great white appears.
However, he's often in open water and is only in the cage when really needed.
He says sharks will often just swim past but sometimes actively try to hunt.
Mark explains: "It would start off by observing from a distance and then it would make approaches from different angles, pretty casual approaches, and usually when they're doing that they're trying not to be seen."
We think we might leave the abalone diving to you, Mark.
10 Easiest Places To Get Eaten By A Shark
10 Easiest Places To Get Eaten By A Shark
New Smyrna Beach in Florida has the dubious honour of having more shark attacks annually than any other beach. The beach is part of Volusia County, which accounts for roughly 37% of Florida’s 663 attacks since 1882.
It is estimated that anyone who has swam there has been within 10ft of a shark, according to National Geographic. However, there have never been any fatalities on New Smyrna.
However, that can't be said for the rest of Florida. Since 1988, there have been 6 fatalities.
The number of fatal, unprovoked shark attacks in South African waters between 1990-2009, is 22, according to the KwaZulu Natal Sharks Board. There have been 136 attacks in total.
In 2012, there were four shark attacks in South Africa, three of them fatal, according to the International Shark Attack File.
Picture: A woman enters the water as workers aboard a boat, right, place a shark exclusion net at Fish Hoek beach, on the outskirts of Cape Town, South Africa, Friday, April 5, 2013.
There have been 207 unprovoked shark attacks in Australia over the last 20 years, and 124 of those occurred in the last 10 years, reports Australian Geographic.
According to The West Australian newspaper, Western Australia has become the deadliest place in the world for shark attacks, after the fourth death in seven months occurred in 2012.
Picture: Shark warning sign on Botany Bay beach. Sydney, Australia.
In the past 20 years Brazil has become an increasingly hazardous place to go swimming.
While the north-east coast might have a stunning coastline and bath-temperature waters, the BBC report that off the shore of Recife are many aggressive sharks, which has made this one of the most dangerous places in the world to swim.
Brazil's sharks appear to be some of the most dangerous in the world. The death rate of 37% (21 of the 56 attacks in 20 years) is much higher than the worldwide shark attack fatality rate, which is currently about 16%, according to the Florida State Museum of Natural History.
Picture: Placard warns about a shark hazard in Boa Viagem beach in Recife, northeastern Brazil on September 11, 2012.
After 14 unprovoked shark attacks were reported in Hawaii in 2013, according to hawaiisharks.com, locals have become increasingly nervous about the risk posed by sharks
From 1828 to December 2013 there have been 128 total unprovoked shark attacks in Hawaii, 10 of which were fatal attacks, according to the International Shark Attack File at the Florida Museum of Natural History.
Picture: Japanese tourists stroll along Waikiki Beach in Hawaii, following a shark siting in 2001, which closed the beach.
California has had 109 confirmed unprovoked shark attacks since 1926, according to the International Shark Attack File, and the state ranks second in the U.S. for shark attack frequency.
There have been 10 fatal attacks, and the last was just two years ago in Santa Barbara in 2012.
Papua New Guinea has had nearly 50 shark attacks (half of them fatal) .
The Guardian report that the country has a disproportionately high number of shark attacks, considering its small population size, because of the country's location, with extensive seas coasts and warm climates.
Picture: Trobriand Island In Trobriand, Papua New Guinea
Since 1837, 71 shark attacks and two fatalities have occurred in South Carolina, according to the International Shark Attack File at the Florida Museum of Natural History.
Of those, 16 attacks are recorded off the beaches of Horry County, where the town of Myrtle Beach is famous as a tourist destination, according to Yahoo.
Luckily, there have been no fatal shark attacks in South Carolina since 1852. But in 2012, South Carolina had a worryingly high level of incidents, when five attacks were reported.
Picture: Myrtle Beach
Despite its size, New Zealand has a relatively high incidence of shark attacks, according to The Encyclopedia of New Zealand.
Since 1852 there have been 44 recorded unprovoked attacks (compared with 39 in the whole of Europe since 1847).
A third of New Zealand attacks occurred between Ōamaru and the Otago Peninsula, probably because sharks are attracted by the high numbers of seals, dolphins and pilot whales in that area.
Picture: A flower tribute at Muriwai Beach near Auckland, New Zealand, after a shark killed Adam Strange in 2013.
Mexico has had 42 shark attacks (22 fatalities) since 1880.
Picture: People walk along Troncones beach in Mexico's Pacific Coast village of Troncones in 2008, after sharks attacked three surfers in the area in less than a month, two fatally.