Assertion: mane jellyfish | /r/CapableOf | exceed 6 ft
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text: (2–40 cm) in diameter, though the lion's mane jellyfish, Cyanea capillata, which is found in cold northern seas can exceed 6 ft (1.8 m) across and have tentacles over 100 ft (30 m) long; a similar jellyfish is also found in the waters off New Zealand and Australia.