Assertion: bluefin tuna's size | /r/HasAspect | average lifespan of 12 years
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text: It can measure up to 2 meters, can swim between 2-3 kilometers/hour and can dive to up to 500 meters;however, the average size of a Southern Bluefin Tuna caught today weighs only approximately 7 kilograms, and has an average lifespan of 12 years.