Illegal divers also search for rock lobster which is sold on the local market.

“Deurick and I started poaching when we were 15 years old,” his cousin Bruce van Reenen, 23, told AFP, struggling to control his emotions.

“Often we were fishing together, but that night we weren’t. We went on separate boats, I went diving around the corner in Camps Bay and Deurick went to Cape Point for lobster that night.”

Divers like Van Blerk and Van Reenen can earn hundreds of dollars for a successful night’s fishing.

But it is a fraction of what the dried abalone is worth on the markets of Hong Kong, with prices reaching thousands of dollars per kilogramme.

Overfishing started affecting abalone stocks as early as the 1950s, but it was not until the mid-1990s that rampant poaching began to take a grave toll.

George Branch, a marine biologist at the University of Cape Town, told AFP that since commercial harvesting began, abalone stocks have been reduced to a quarter of what they once were.

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And West Coast rock lobster has dwindled dramatically to just 2.5 per cent of its original population.

“Abalone is going almost entirely to East Asia, predominantly Hong Kong,” said Markus Burgener of TRAFFIC, an NGO that monitors wildlife trade.

Retail prices in Hong Kong for dried South African abalone vary from US$300 per kilogramme to over US$10,000, he said.

“It is ultimately being consumed in China because that is where the greatest demand lies,” he explained, saying there were huge numbers of people involved in the commodity chain.

“The real issue is that there are thousands of people involved. It just can’t be sustainable.”

Van Blerk’s family live in Hangberg, a poor coastal community on the edge of Hout Bay some 20 kilometres (12 miles) from Cape Town, where abalone and lobster poaching is a rare source of work.

“It’s a threat for me also because they are shooting at us now,” his cousin said. “But what can I do? I must go on, it’s my life.

“I lost a cousin, unfortunately, but my life must go on because otherwise, my child will go hungry.”

Van Blerk’s girlfriend was pregnant when he disappeared, and she has since given birth to a baby girl.

She had waited for him to return at dawn, ready with his regular morning coffee.

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But she has heard nothing, and there has been no sign of a body found.

Van Blerk’s two fellow crew members who went out with him that night say he was shot during an anti-poaching enforcement operation which left bullet holes in the boat.

They have since filed a criminal case against the authorities for attempted murder.

Khaye Nkwanyana, spokesman for the fisheries department, told AFP investigations were ongoing. He said the task force “should only fire in self-defence”.

Community activist Roscoe Jacobs, 32, said local people see poaching as one of the few ways out of poverty.

“It’s not something that people want to do, but because of our socio-economic conditions, it’s something that we are forced into,” he said.

“You really do it because it’s either that, or do I go and rob somebody? It’s something that you do at your own risk.”

Jacobs defended poaching, saying that “conservation needs to be considerate of people”.

“We’ve been living off these resources for more than 300 years and we will live off these resources for 300 years to come.”

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The illicit quarry draws divers into a deadly world of gangland violence and international crime syndicates.

In September, South African police seized a truck heading to Botswana carrying 10kg (22 pounds) of abalone with an estimated street value of US$400,000.

And last year, Chinese authorities broke up a smuggling ring in the southern city of Guangzhou, which was attempting to shift US$115 million in seafood, including abalone.

China’s growing middle class has a near insatiable appetite for abalone.

In Shanghai, one infamous restaurant bill recently charged US$14,700 for a dish for eight people called “half-headed abalones with frozen sake”.

“Middlemen sell it to a syndicate of Chinese buyers,” one source with knowledge of the trade told AFP.

“The middlemen make the real money, not the poachers.”