Assertion: tuna | /r/HasProperty | unique
Facets:
value: among fishes
type: OTHER
value: in their ability
type: OTHER
value: because of this vascular system
type: CAUSE
Source sentences:
text: Because of this vascular system, tunas are unique among fishes in their ability to maintain the temperature of their bodies above that of the surrounding water, often between 5 and 12 °C (9 and 21.7 °F) above ambient water temperature.