Swimming with captive dolphins is dangerous

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Facilities like the Hotel Los Delfines that allow direct human contact with marine mammals, are exposing their customers to possible infection and injury.

The reverse is also true—The Hotel Los Delfines is exposing Wayra and Yaku to possible human diseases or injury as the result of inappropriate behavior by the public.

Diseases contracted from marine mammals however are difficult to treat and diagnose, as they may be overlooked or even ignored by physicians who are not aware of the risks—or range—of potential infectious diseases.

In a report to the U.S. Marine Mammal Commission (MMC), researchers from the University of California highlighted the potential health risks to which humans are exposed through contact with marine mammals: In an internationally distributed survey of people who come into contact with marine mammals (primarily those who work with these animals), 23 percent of respondents reported contracting a skin rash or similar ailment.

Respiratory diseases were also reported in nearly a fifth of marine mammal workers, including diseases such as tuberculosis. Clearly, exposure to marine mammals can involve a health risk to people working with the animals, but it can also threaten the health of the public.

Attacks on humans

Clearly the public has an image of the dolphin as friendly and gentle. The Hotel Los Delfines and CILDE do strengthen this wrong perception by publishing in their website and educational material dozens of phrases like this one:

It is about teaching them (the children) to take advantage of their intelligence and creativity for doing good to their neighbors and to discover the wonders of nature along with Yaku and Wayra who, through their language, teach us about the love and tenderness that we must hold in our hearts, the kindness that our planet shelters, and how to transmit the love and concern towards our environment, our home, THE EARTH, to others around us.”

But even if dolphins are intelligent and playful animals – they are still large and very efficient predators, that could easily kill a man. Moreover, in the wild, their behavior to other dolphins and other marine mammals is often aggressive—and sometimes violent. For example, bottlenose dolphins, the most commonly kept cetacean species in captivity, have been regularly reported attacking and killing members of other cetacean species, and even attacking and killing conspecifics’ calves.

Orcas, another commonly kept cetacean and the biggest dolphin species, are well known for their predatory behavior and have been recorded killing a wide variety of marine mammal species.

Cetaceans routinely kill mammals in the wild. Humans are also mammals, equal in size or typically smaller than many of the mammals killed by bottlenose dolphins or orcas.

It is extremely foolish to think that somehow the rules do not apply to humans. We are not immune to aggression or injury by cetaceans.

In Hawaii, a short-finned pilot whale (Globicephala macrorhynchus) grabbed hold of a human swimmer, pulling her down 10–12 meters underwater before letting her go. Although the swimmer was lucky to not have been drowned, she suffered a bite wound that required nine stitches.

As the number of facilities increases that offer encounters with dolphins in the water, particularly in regions where there are few or no safety regulations, safeguards, or reporting requirements, like in Peru, so the likelihood of more human injuries and deaths also increases.

It would never be acceptable for zoos to allow visitors to interact freely in an enclosed space with chimpanzees, gorillas, lions, or elephants. It is folly to regard interactions with marine mammals as safer than those with other large wildlife species.

Several factors additionally increase the probability of aggressive behavior by dolphins:

1.) Inappropriate behavior:

Inappropriate behavior, such as touching sensitive areas of the dolphin’s body, like the eyes or blowhole, increase the likelihood of aggression by the dolphins. To date there has only been one record, in Brazil, of a bottlenose dolphin killing a person. The animal who caused the incident was a solitary male, named Tiao by locals, with a history of approaching human swimmers as well as of inflicting injuries: 29 swimmers had reported injuries, mostly as a result of the humans “harassing” the dolphin by grabbing his fins or trying to jump on his back. Eventually, on 8 December 1994, the dolphin rammed a man (who was reported to have been attempting to put objects into the dolphin’s blowhole), rupturing his stomach and causing his death.

2.) Captivity

Captivity causes unnatural living conditions for marine mammals. Animals from different groups or even ocans are stuck together in small pools were aggression can not be avoided by creating physical distance between the animals, conflicts between the animals do become permanent and cant be resolved causing a latent threat of explosive aggression. Captive dolphins are time bombs.

Dr. Horrace Dobbs, medical research scientist, author, Founder of the Oxford Underwater Research Group and later Founder of International Dolphin Watch, and since 1986 one of the British Pioneers of dolphin therapies with dolphins in the wild (not in captivity)  resumes his concerns:
Natural man-dolphin encounters (not tour-organized) almost always involve isolated dolphins, turned away from their groups or orphans. Those dolphins seek in men a substitute of the social relationship represented in nature by the herd.” However, “not every solitary dolphin has a friendly character, and some of them became famous because they broke legs and arms of swimmers who approached them inadequately. Notwithstanding, many people received great benefits from meetings with dolphins, and those animals were able to unlock pathologies which were considered serious or incurable. For this reason, in many dolphinariums programs of therapy-in-pool are organized: here, though, dolphins are forced and prisoners, their territory is very narrow, and abnormal behavior (even aggressive) is not rare.

The aggression and violence of which orcas are capable were clearly witnessed at Sea World San Diego in August 1989, when an Icelandic female (Kandu V) rammed a northeastern Pacific female (Corky II) during a show. Although trainers tried to keep the show going, blood began to spurt from a severed artery near Kandu’s jaw. Sea World staff then quickly ushered away the watching crowd. Forty-five minutes after the blow, Kandu V died. It should be noted that two orcas from different oceans would never have been in such proximity naturally, nor is there any record of an orca being killed in a similarly violent encounter in the wild.

Captive orcas are the marine mammals most associated with human injuries and deaths. In 1991, a group of orcas killed trainer Keltie Byrne at Sealand of Victoria, Canada. In front of a shocked audience, the orcas held Byrne underwater until she drowned. Eight years later, one of those same orcas, Tillikum, was discovered one morning with the dead body of a man, named Daniel Dukes, draped on his back at Sea World Orlando. Dukes had also drowned and suffered a host of minor injuries incurred both pre- and postmortem, suggesting that Tillikum had once again held a person underwater until he died. Dukes had apparently either snuck into the facility at night or stayed in the park after closing in an attempt to swim with the whale, calling into question the park’s security procedures.

The potential for violence in orcas was also seen when a young orca called Ky attacked his trainer, Steve Aibel, at Sea World San Antonio in July 2004. During a show, the animal hit the trainer, pushed him underwater, and positioned himself between the trainer and the exit ramp of the pool. The trainer was rescued from the whale by another staff member only after several minutes of being unable to bring the animal under his control.

But aren’t these only unfortunate accidents?

The personnel at Swim-with-dolphin-programs claim that almost all injurious human-dolphin interactions are accidents. However experts express skepticism about the accidental nature of these injuries. Marine mammals are clearly capable of inflicting injuries and even killing humans.

A study from the University of California found that 52 percent of the surveyed marine mammal workers in zoos and dolphinaria reported some form of traumatic injury caused by a marine mammal (251 cases altogether). Those in regular contact with marine mammals or involved with cleaning and repairing enclosures were more likely to be injured.

The United States National Marine Fisheries Service NMFS received between 1989 to 1994 more than a dozen reports of injuries to people who participated in programs that allowed customers to swim with dolphins in captivity. The injuries reported ranged from lacerations to broken bones and shock. One man suffered a cracked sternum when butted by a dolphin, and a woman received a broken arm when similarly rammed.

In another incident, on 7 October 2004, a 49-year-old man was admitted to Jackson Memorial Hospital, having sustained injuries from a captive female dolphin at the Miami Seaquarium. The injuries were severe enough that surgery was required.

The fact is that at any time during a swim session, especially one that is not controlled, dolphins may inflict minor to serious injuries on swimmers for various reasons, some of which are neither obvious nor predictable. Even in controlled swim sessions, the risk is always present and is potentially lethal.

Read more about dolphin captivity and the Hotel los Delfines at:


Whale watching and conservation initiatives:

Whale and dolphin watching offers an economic alternative to whaling and support species conservation. Whale watching tours are also offering research opportunities. Support species conservation and research, while enjoying whales and dolphins in Peru with Nature Expeditions.

Become a dolphin conservation volunteer and support the conservation and research programs of Mundo Azul.


What we do to stop the dolphin slaughter in Peru:

According to our estimate between 5000 and 15000 dolphins are killed illegally in Peru each year to be used as shark bait by Peruvian fishermen. Additionally up to 3000 dolphins are killed each year illegally in Peru for human consumption. In 2002 Mundo Azul started investigating the Peruvian black market on illegally caught dolphin meat. The dolphin meat is regularly landed at night on beaches near the ports in order to avoid the controls of harbor officials. At this point, the meat is already cut into small pieces and hidden in boxes, while heads, flukes, bones and intestines have been thrown over board before or while entering the harbor. The meat is then openly sold on local markets. In 2013 Mundo Azul uncovered the massive dolphin kill for shark bait. Stefan Austermühle, Executive Director of Mundo Azul, managed to travel in a full month fishing trip and filmed the brutal killing of dolphins – pictures that sent a shock wave around the world. Please support our campaign to pressure the Peruvian government to act decisively in order to end the dolphin killing in Peru.;

Mundo Azuls volunteers are engaged in undercover investigation of illegal sales of dolphin meat. We are then providing the collected intelligence to the Peruvian police and are actively supporting the implementation of police raids. We are also supporting the Peruvian police thru capacity building. Raising public awareness and environmental education are further activities of our dolphin conservation campaign. We are engaged in dolphin research providing us with important baseline information for conservation planning. Finally we are promoting whale and dolphin watching as a sustainable economic alternative to illegal dolphin killing.

We are also active on an international level against dolphin captivity and whaling.


What you can do to stop the dolphin slaughter in Peru

  1. Spread the word: share this web-page with your social network friends or send out the link by email.
  2. Go whale watching and dolphin watching in Peru with Nature Expeditions: This way you are directly supporting Mundo Azuls research and conservation work and you are showing the Peruvian public that tourism can be an economic alternative to dolphin killing
  3. Sign on to the various action alerts and signature lists published regularly in Mundo Azuls web site.




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Book the following trips with Mundo Azuls commercial partner Nature Expeditions in Peru in order to support our conservation work.

Whale watching                            Dolphin watching                                 Swimming o scuba-diving with sea lions


Sea lion observation                     Scuba diving                                                                         Pelagic birding


coastal marine birding               coastal wetland birding                                                     Urban birding in Lima


Protected bird site                                           Coastal desert oasis

Pantanos de Villa                                               Lomas de Lachay                                              Birding in the Andes





Please also support the following conservation campaigns

Save the dolphins          Save the sharks                                                                                         Save the sea lions



Save marine turtles       Save marine birds                                                                                  Save marine otters