For lobsters, that's still a matter for debate. See [1] and [2]. Some animals just do live a long time though. A clam believed to be 405 years old was found in

For lobsters, that's still a matter for debate. See [1] and [2]. Some animals just do live a long time though. A clam believed to be 405 years old was found in waters off Iceland in 2007 [3]. I'm not a marine biologist, but I suspect that an absence of predators may be relevant. [1] http://en.wikipedia.org/wiki/Lobster#Longevity http://en.wikipedia.org/wiki/Lobster#Longevity [2] http://skeptics.stackexchange.com/questions/8520/under-the-right-circumstances-can-lobsters-live-indefinitely http://skeptics.stackexchange.com/questions/8520/under-the-r... [3] http://phys.org/news112870855.html http://phys.org/news112870855.html