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10 animals with the longest life spans

By: Bryan Nelson on Jan. 19, 2010, 1:31 p.m.
Antarctic sponge, Cinachyra antarctica

Photo: Martin Rauschert/World Porifera Database

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Antarctic sponge

Perhaps due to the extremely low temperatures of the Antarctic Ocean, this immobile creature has an extremely slow growth rate. Some estimate the oldest known specimens are 1,550 years old.