Are Great White Sharks Warm Blooded
Great white sharks are not true warm blooded mammals or birds. They are cold blooded fish, classified as ectotherms, meaning their body temperature generally matches the surrounding water.
Regional Endothermy in Great Whites
Despite being cold blooded, great whites can keep some body parts warmer than the water. They use specialized blood vessel networks called countercurrent heat exchangers to retain heat generated by powerful swimming muscles.
Why Warm Body Temperature Matters
Warmer muscles help great whites swim faster and digest food more efficiently. This advantage supports their role as top ocean predators, but it does not make them fully warm blooded like marine mammals.
Learn more about shark biology and temperature regulation on the NOAA Fisheries website NOAA Fisheries.
