other disease Great white shark

Pneumonia in the Great White Shark

"Pneumonia in the great white shark" is not a disease recognized by current scientific veterinary or fisheries literature. The great white shark, like all cartilaginous fish, breathes through gills rather than lungs: lung inflammation as se...

What is it?

"Pneumonia in the great white shark" is not a disease recognized by current scientific veterinary or fisheries literature. The great white shark, like all cartilaginous fish, breathes through gills rather than lungs: lung inflammation as seen in mammals (dogs, cats, humans) has no anatomical equivalent in this animal. It is possible that this term results from confusion with gill or respiratory conditions observed in other species, or that it comes from a non-scientific source. This fact sheet therefore acknowledges the limits of our knowledge and, for informational purposes, presents the general principles of respiratory (gill) disease that may affect sharks in general.

Key point

This fact sheet addresses a term not scientifically recognized for this species; it is provided for informational purposes to clarify possible confusion.

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Commonly observed signs

These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.

Related signs — each one links to its page:

No specific clinical signs of "pneumonia" are described in the great white shark. By extrapolation from general gill disease in fish, abnormal swimming, an animal remaining near the surface or struggling to maintain balance, faster or irregular respiration (water movement through the gills), and general weakness could be observed. These signs remain hypothetical and are not specifically linked to a disease called "pneumonia" in this species.

When to consult without delay

This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.

Causes and risk factors

In cartilaginous fish like sharks, there are no "lungs" as understood in mammals: respiration occurs through the gills. The term "pneumonia" is therefore not medically appropriate for this species and reflects confusion or erroneous extrapolation from human or terrestrial veterinary pathology. Real respiratory disease in the great white shark involves gill disease (branchitis), most often from parasitic, bacterial, or water pollution causes, but no "pneumonia" is scientifically documented in this species.

No specific risk factors are documented for this disease in this species. In general, poor water quality, high parasitic load, or weakened immune system (stress, injury, old age) could promote gill disease in fish overall.

Diagnosis and care

Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.

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As a wild animal not held in captivity, individual veterinary monitoring does not exist. The limited information available comes from post-mortem examinations (necropsies) performed during strandings, or observations by marine biologists of weakened individuals. A veterinarian specializing in marine wildlife or a marine biologist would examine the gill structures (since sharks have no lungs), and search for infectious agents through laboratory analysis (bacteriology, parasitology, histology) of tissue samples.

Treatment

No treatment is documented or practical for a wild, protected species that cannot be individually treated at sea. If gill damage is confirmed in an individual exceptionally brought into care (stranding, rescue), management would fall to a marine wildlife specialist team, with supportive care and targeted treatment based on the identified cause (parasitic or bacterial).

Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.

Prevention

No individual preventive measures apply to a wild, migratory species like the great white shark. At the population level, preserving the quality of marine waters, reducing pollution, and protecting coastal habitats support the overall health of marine ecosystems and, indirectly, the health of sharks.

Possible complications

Not documented in this species due to the absence of reliable scientific description of the disease under this name.

When to see a veterinarian

This situation does not concern a pet or farm animal followed by a treating veterinarian.

If you observe a great white shark stranded, injured, or in distress on a Tunisian or Mediterranean coast, contact maritime authorities or a national marine wildlife stranding network immediately.

Never attempt to handle or treat a great white shark yourself; it is a protected species and potentially dangerous.

Prognosis

Cannot be assessed: the lack of reliable scientific documentation of this disease in great white sharks makes it impossible to establish a prognosis.

Frequently asked questions

Can a great white shark get pneumonia like a dog or a human?

No. Pneumonia is an inflammation of the lungs, an organ that sharks do not possess. Sharks breathe through gills. We therefore cannot speak of "pneumonia" in this species in the strict medical sense.

Do great white sharks suffer from respiratory diseases?

Gill damage (structures used for breathing) can exist, caused by parasites, bacteria, or poor water quality, but it is not called "pneumonia" and is very poorly documented in this wild and difficult-to-study species.

Why is so little information available about great white shark diseases?

It is a protected species, highly mobile, living in the open ocean, and impossible to keep sustainably in captivity for study. Knowledge comes essentially from occasional observations or necropsies following strandings, which severely limits available data.

What to do if you observe a great white shark in distress or stranded? If you encounter a stranded or distressed great white shark: 1. **Keep a safe distance** – Great white sharks can be extremely dangerous, even when injured or beached. 2. **Do not touch the animal** – Avoid any contact, as the shark may react unpredictably. 3. **Alert authorities immediately** – Contact local wildlife services, marine animal rescue organizations, or coastal authorities without delay. 4. **Provide information** – Tell responders the shark's exact location, approximate size, and condition. 5. **Keep onlookers away** – Prevent crowds from gathering, which can stress the animal further and create safety hazards. 6. **Do not pour water on it** – Contrary to common belief, this may worsen its condition; specialists will know the appropriate care. 7. **Document if safe** – If you can do so from a distance, photos or video may help rescuers assess the situation before arrival. **Professional rescuers** have specialized equipment and training to handle such situations safely for both the shark and humans. Time is critical, so contacting experts quickly gives the animal the best chance of survival.

You must immediately contact local maritime authorities or a marine wildlife stranding network, without attempting to handle the animal yourself, as it is a protected species and potentially dangerous.

References

WOAH — Organisation mondiale de la santé animale (ex-OIE)

Content reviewed by the TunisieVet editorial team · Updated 29 August 2026

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AT A GLANCE

AgentOther
SpeciesGreat white shark
VaccineNo
Transmissible to humansNo

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Affected species

This information is provided for educational purposes only and is not a substitute for a veterinary consultation. If you have any concerns about your animal's health, consult a veterinarian.

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