Assertion: japanese sea lion | /r/CapableOf | weigh about 450 to 560 kilograms
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text: Male Japanese sea lions were dark grey and weighed about 450 to 560 kilograms (990 to 1,230 lb), reaching lengths of 2.3 to 2.5 metres (7.5 to 8.2 ft); these were larger than male California sea lions.