Bluefin tuna have a particularly well-developed circulatory system. This makes them warm-blooded fish and swift swimmers (72.5 km per hour), with a huge migration capacity.
https://europe.oceana.org/en/eu/media-reports/features/bluefin-tuna#:~:text=Electronic%20marking%20studies%20have%20shown,waters%20where%20they%20were%20born.
https://www.fisheries.noaa.gov/search?oq=bluefin+tuna
https://www.floridamuseum.ufl.edu/discover-fish/species-profiles/thunnus-thynnus/