Lobsters are often described as showing negligible senescence, meaning they do not exhibit the typical decline in strength or fertility seen in many animals as they age. One reason is that they produce telomerase, an enzyme that helps maintain the ends of chromosomes and supports ongoing cell division in many tissues.

However, lobsters are not biologically immortal. As they grow, they must repeatedly molt their hard shells—a process that becomes increasingly energy-intensive and risky. Many eventually die from the stress of molting, disease, injury, or predation rather than from aging itself, making them exceptionally long-lived but not immune to death.

https://www.reddit.com/r/STEW_ScTecEngWorld/comments/1vfur76/why_lobsters_dont_seem_to_age_like_most_animals/

I wonder if I could sell them tiny little angle-grinders.