Tuna can swim at speeds approaching 40 miles per hour.
Notes on verification
Multiple independent sources (WWF, UMass Amherst, Wikipedia, speedofanimals.com) confirm tuna speeds at or above 40 mph, with some estimates up to 50 mph. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.833 clusters=3 claim_tier=notable]
Sources
- These popular tuna species are no longer endangered ... (seed:environment_and_wildlife)
- https://www.worldwildlife.org/species/tuna/ (corroboration)
- https://websites.umass.edu/natsci397a-eross/overfishing-of-the-atlantic-bluefin-tuna-3 (corroboration)
- https://www.speedofanimals.com/animals/bluefin_tuna (corroboration)