okay first of all, really obsessed with the spelling of lobster as loobster.
second of all, it looks like the oldest lobster on-record actually was solidly into the triple digits, being about 140 years old. he was released back into the sea though, so we don't know what happened to him. oh, also, he was named george. awesome.
third of all, and i think the most interesting thing i have to provide here, is that i follow a woman on social media who had a pet crab named howie. receiving the attentive care that she did, howie greatly exceeeded her average lifespan, but at a point, it seems molting just takes too much energy/deals out too much metabolic stress, and i don't know if there's really a way to interfere that wouldn't further stress out the animal...
in the meantime, hey, there're other pets that make great, long-living family heirlooms, like turtles and parrots, which can each get decades under their belts.