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The Origin and Development of Cage Diving with White Sharks: Part 2



Guadalupe, Mexico

My travels took me to Isla Guadalupe in 2013. 240 km west of the Mexican landmark Baja California lies this small volcanic island. The 32-kilometer-long and eleven-kilometer-wide island is nothing more than a large deserted rock in the Pacific. Uncharted, no fresh water, just a spot on a sea chart. But for divers a paradise. Because Guadalupe is next to South Africa and Australia, it’s a meeting point for the world’s largest predator: Carcharodon carcharias, the Great White Shark!

About 200 animals visit the island each season, of which 155 are known as recurring individuals and therefore have received names from the researchers. All ships have the opportunity to experience the sharks in deep cages, which are lowered to 12 – 15 meters. For the surface cages, bottles are not used in this type of diving, the air supply comes from the mother ship using air hoses on the regulator. Emergency bottles in the cage are available. A special lead system (lead support straps with a lot of lead) is provided to ensure a comfortable and stable position in the cage. Fins are not used. The cages meet the latest and most advanced knowledge of shark research and, of course, meet strict US safety requirements. Safety at the highest level is guaranteed, as is the maximum free view of the sharks, in order to guarantee optimal photos & filming.

The cages can accommodate 2-4 persons. Regular exchanges are self-evident, so that no guest is disadvantaged and the Great Whites can be experienced as often and as close as possible.  Up to three animals are circling around my cage at the same time, demonstrating their interest in the divers; they swim close to the cages and touch them gently. The depth cages can also be opened upwards, which makes it possible to leave the cage quickly. There, in 12 – 15 meters of water depth, you are eye-to-eye with the great whites – an indescribable feeling when they slowly rise from the deep towards the cages.

While the depth cages can only be used by certified divers, the surface cages also offer non-divers the opportunity to experience the Great Whites close up. Here too, the crew uses chum and tuna fish heads. But if the sharks do not feel like it, they do not come to the boat either. The first day we waited desperately on board for the predators to come closer to the surface. We could make out their shadows about 20-30 meters below our cages, but that’s about it. If you only have four full dive days and do not see sharks on the first day, you get very disappointed. Especially when you think of the thousands of Euros you have just spend for such a trip. But you are not in the zoo, you are in the wild – nothing can be planned!

During the next days, the sharks became more active. Up to four sharks now circled almost constantly around the cages. Partially so close that I could touch them. But since I wanted to keep my hands, I resisted the temptation.

In Guadalupe, scientists can also dive outside the cage with the white sharks – but only with a permission from the Mexican authorities. Photos of Apnoe divers like Frédéric “Fred” Buyle or Ocean Ramsey are an impressive evidence that white sharks do not necessarily equate humans with food. A few years ago, the free-diving, or rather the diving outside a cage, with other potentially dangerous shark species such as tiger sharks or bull sharks was considered impossible. Today, regular dive trips are organized for everyone to the Bahamas or the Fiji Islands to do just that.

So, what about Guadalupe? From my own experience, I know that out-of-cage diving happens at least since 2012. Again, the internet is full of proof photos. Unofficially and illegally, yes. But also without any attacks on the divers.     

Does the cage industry harm the White Sharks?

What about the white sharks themselves? Does commercial cage diving harm the white sharks? It is difficult to assess whether cage diving has already harmed white sharks in the hitherto practiced form. Injuries to sharks during cage diving are from rough handling of the bait when sharks bite in them. The sharks can get tangled and injured in thick ropes, chains, or steel hulls, with which bait and cages are attached, injured from mis-designed cages, sharp metal objects and ship bolts. Even the use of markers (tags), where duck shells and other marine organisms accumulated, already led to serious skin injuries. All these injuries can be avoided by careful planning during cage diving.

Today, cage diving with white sharks is strictly regulated. These laws prescribe exactly what baits you can use and what can be used as chum, how much you can use daily and how to treat the sharks at the boat. Only natural fish products may be tipped into the sea. Mostly, chum is made of mashed up sardines.

“So, no blood, no pig’s heads, cattle, or hated mother-in-law’s”, Craig Ferreira says with a smile.

These rules were introduced to protect the sharks, the environment and tourists. Most people believe when chum is in the water, the sharks come swimming from miles away. This is absolute nonsense. Just as we don’t smell the aroma from a delicious restaurant when the wind comes from the wrong direction, sharks are not being lured in by the chum when the current is unfavorable. The only sharks that are being attracted are the sharks swimming in the chum slick. Sharks, which are one kilometer away or are beyond the chum slick, are not lured to the boat.

Let us look at the facts: White sharks are nomads and swim great distances in the world’s oceans. This means that they are never very long in a particular area. They move continuously along the coasts, up and down. They swim hundreds of kilometers out into the open ocean and they even cross oceans.

“In the winter months (May – October) white sharks are found around the seal colonies of False Bay, Mossel Bay and Gansbay. In the summer, the sharks swim off the islands into shallow water close to the coast. So, they swim close to our beaches, in close proximity to bathers and surfers – and they have always done so. In the early 1990s, we already analyzed the sharks’ migration and were able to demonstrate this behavior. At that time, however, there was still no cage diving in South Africa. Today, studies on the migration of white sharks show the same behavior. As a result, the cage diving cannot have influenced the behavior of the sharks. It does not matter how much chum is poured into the water or how many baits are hanging on the boats – when the sharks decide it’s time to move, they do”, says Craig Ferreira.

It is often claimed that cage diving is responsible for (more) shark attacks. This is wrong. Why should cage diving lead to shark attacks? Where is the connection? Well, some think that the sharks associate the people in the cages with food. Even if that were true, how does it fit into the attacks on swimmers and surfers? Why should a shark look at the people in the cages, and then decide to swim to the beach to catch a few surfers? If that were the case, why are there still so few shark attacks? The numbers would have exploded after the introduction of the cage diving. But they haven’t. Fishermen have been using bait and blood for centuries to lure in predators.

Should fishing be prohibited? No, because that has not influenced the behavior of the sharks either (at least not regarding shark attacks). Of course, sharks are lured by bait and blood, but that does not mean that they associate humans with food. There were about a dozen deaths from sharks in the area around Cape Town over the last 20 years, but only two attacks took place during the cage diving season.

A 12-meter-long boat with six people in a cage, looks quite different than a swimmer or surfer. Everything we know about these animals shows us that they are not able to distinguish between humans, the cage and the boat. The shark perceives only a large object. This is the same as for land animals. Lions cannot distinguish between a jeep and humans. They only recognize a large, foreign object.

There is absolutely no evidence that the white shark tourism has led to an increase in shark attacks. All research shows that there is no link between these two points and thus proves that their behavior has not been decisively influenced (for example, the study by Ryan Johnson / Alison Kock: “South Africa’s White Shark Cage – Diving Industry” from 2006, or “A Review of Cage Diving Impacts on White Shark Behavior in New Zealand” by Barry Bruce, 2015). Most doubters have built their opinions through misunderstandings, emotions, false information, and ignorance.

Is shark tourism good for the sharks?

Craig Ferreira says: “Yes, it is. This is my firm conviction and I will explain to you why I think so: The unpleasant reality is that people are only interested in the profit. They are motivated by the profit. If we can get something out of a thing for us, we are there. While it is usually a moral disadvantage for us, it can also sometimes become an advantage. South Africa was the first country to protect the Great White Shark in 1991. Through a study, we found that in a single month 17 White Sharks were killed around Dyer Island and sold to fishermen! In other coastal cities like Struis Bay, jaws were sold to trophy collectors. That was the situation before South Africa opened to the world. However, the shark tourism has led to the fact that white sharks (and other shark species) are worth more alive than dead. Now you could argue that as the sharks are protected, we should better leave them alone and tourism does not play a role for the species conservation. Well, you would be wrong if you thought so. Just consider how important these animals have become for our economy. Although I refer primarily to white sharks, there are many companies that bring tourists to other sharks.”

Today there are a large number of people who depend on sharks because they earn their livelihood with them. If one is so dependent on a thing or a living being, because it secures the income, this is an enormous motivation. Everything is done to protect this “golden egg”. The shark tourism has positively changed the perception of the people of sharks. Numerous (cage) divers have been able to observe sharks in their natural habitat, the many documentaries on television about white sharks have enlightened people and finally destroyed the obsolete picture of the bloodthirsty killer.

It has been shown to the world that these predators do not deliberately hunt us and that we can even inter-connect with them. Most of the people who go out to sea to see sharks return with a new respect and admiration for these animals. The negative perception of people could be influenced by tourism. The white shark, once the most feared and hated shark of all, now serves as an advertisement for shark protection in general.

All photos by Christian Kemper unless otherwise stated.

You can purchase Christian’s book, ‘Strange Pool Friends – Mein Freund, der Hai’, here.






Christian Kemper is a TV journalist from Germany. He has been diving with and studying sharks for more than 20 years. He has written two books about shark attacks and one book about crocodiles. He is a freelance writer for three of the biggest scuba diving magazines in Germany.


WIN a Beuchat Air Light Bag!!!



beuchat-logo-1-300x58.jpgFor this week’s competition, we’ve teamed up with our good friends at Beuchat to give away an Air Light Bag!

The Air Light Bag from Beuchat is a practical travel bag that takes up minimum storage space.

  • Material: 600 denier and 1,000 denier nylon/PVC
  • Soft roller bag, easily stored in its mesh bag
  • Internal retaining straps
  • Zip fastener with eyelets for padlocks
  • Side compartment for fins
  • Outer document pocket with coated zip and carry strap
  • Backpack style straps concealed behind the foam back-plate
  • Drainage vents
  • Red over-moulded wheels; detachable wheel block

To be in with a chance of winning this awesome prize, all you have to do is answer the following question:

In a recent post on (which you can read here), we reported that Mexico is to host the first annual Cancun International Boat Show and Marine Expo this year. But when is the event due to take place?

Is it:

  • A) 9th – 11th July
  • B) 16th – 18th July
  • C) 23rd – 25th July

Answer, A, B or C to the question above:

Beuchat Air Light Bag February 2021

  • Enter the country you live in
  • Terms and Conditions: This competition is open to all visitors to except for members of the Scubaverse team and their families, or employees of Beuchat and their families or employees of Suunto Diving UK and their families. A valid answer to the competition’s question must be entered. If no valid answer to the competition’s question is entered, your entry will be invalid. Only one competition entry per entrant permitted (multiple entries will lead to disqualification). Only one prize per winner. All prizes are non-transferable, and no cash alternative will be offered. In the event that the prize cannot be supplied, no liability will be attached to When prizes are supplied by third parties, is acting as their agents and as such we exclude all liability for loss or damage you may suffer as a result of this competition. This competition closes on 07/04/21. The winner will be notified by email. The Editor-in-Chief’s decision is final.

  • The following fields are optional, however if you fill them in it will help us to determine what prizes to source in the future.

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Miscellaneous Blogs

Jeff chats to… Jill Heinerth – underwater explorer, author and presenter (Watch Video)



In this exclusive Zoom interview, Jeff Goodman, Scubaverse Editor-at-Large, chats to Jill Heinerth.

Jill is one of the world’s premier underwater explorers, and the first person to dive inside iceberg caves. According to filmmaker James Cameron, “More people have walked on the moon than have been to some of the places Jill Heinerth has gone right here on earth.”

An acclaimed polar explorer, cave diver, author, speaker, filmmaker, and climate advocate, Jill is the first Explorer-in-Residence of the Royal Canadian Geographical Society. She is the inaugural recipient of the Sir Christopher Ondaatje Medal for Exploration and Canada’s Polar Medal.

Jill leads expeditions into extreme environments to advance scientific and geographic knowledge. Her projects have been broadcast on the CBC, BBC, PBS, Discovery Channel, and television networks worldwide. Jill was announced as the recipient of the William Beebe Award from the Explorer’s Club and was inducted into the International Scuba Divers Hall of Fame in fall 2020.

Her bestselling book INTO THE PLANET – My Life as a Cave Diver  has drawn acclaim from the New York Times, Wall Street Journal, NPR, and O Magazine. Heinerth details her journey into the extreme world of underwater cave exploration, where she has had to overcome fear in order to go where no one has gone before.

Find out more about Jill and her work at:

Rather listen to a podcast? Listen to the audio HERE on the new Scubaverse podcast channel at Anchor FM.

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Explore the amazing triangle of Red Sea Reefs - The Brothers, Daedalus and Elphinstone on board the brand new liveaboard Big Blue.  With an option to add on a week at Roots Red Sea before or after. 

Strong currents and deep blue water are the catalysts that bring the pelagic species flocking to these reefs. The reefs themselves provide exquisite homes for a multitude of marine life.  The wafting soft corals are adorned with thousands of colourful fish. The gorgonian fans and hard corals provide magnificent back drops, all being patrolled by the reef’s predatory species.

£1475 per person based on double occupancy.  Soft all inclusive board basis, buffet meals with snacks, tea and coffee always available.  Add a week on at Roots Red Sea Resort before or after the liveaboard for just £725pp.  Flights and transfers are included.  See our brochure linked above for the full itinerary.

This trip will be hosted by The Scuba Place.  Come Dive with Us!

Call 020 3515 9955 or email

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