Sharks don’t get cancer
Sharks can get cancer. A published pathology report diagnosed an invasive carcinoma in a whitespotted bamboo shark.
The bit that matters
- The reported shark lived in captivity. One case does not tell us how often sharks get cancer.
- The diagnosis was a malignant carcinoma, rather than a benign growth.
Follow the evidence
Research and a separate source check inform this explanation. Keep the qualifications with the fact.
- Squamous Cell Carcinoma of the Rostral Maxilla in an Adult Captive Whitespotted Bamboo Shark (Chiloscyllium plagiosum) (opens in a new tab)
Journal of Zoo and Wildlife Medicine 48(3), 902-905; Culp et al.; American Association of Zoo Veterinarians; NC State-hosted paper · Retrieved 2026-10-16
A captive adult whitespotted bamboo shark had histologically diagnosed, locally invasive squamous cell carcinoma. No metastasis was observed.
- Cartilage (Bovine and Shark) (PDQ), Health Professional Version (opens in a new tab)
National Cancer Institute, PDQ Integrative, Alternative, and Complementary Therapies Editorial Board · Retrieved 2026-10-16
The summary reports that multiple cancers have been detected in sharks and labels immunity a mistaken belief.
One discovery leads to another.
Claim version 1 · Evidence reviewed 16 October 2026 · No historical origin is asserted without evidence.