Lobsters Live Over A Century

Lobsters possess a remarkable biological trait known as indeterminate growth, meaning they continue to increase in size throughout their entire lives, rather than reaching a fixed adult size like many other animals. This continuous growth is intrinsically linked to their impressive longevity. As they grow, lobsters periodically shed their hard exoskeletons in a process called molting, allowing them to expand. This cycle of growth and shedding contributes to their sustained vitality, as they do not exhibit the typical signs of weakening or deterioration associated with aging in most species.

The scientific explanation behind this extended youth lies in their cellular makeup. Lobsters produce an enzyme called telomerase in most of their cells throughout their lives. In humans and many other organisms, telomeres—protective caps on the ends of DNA strands—shorten with each cell division, eventually leading to cellular senescence and the aging process. However, telomerase in lobsters works to repair and maintain these telomeres, effectively extending the life of their cells and allowing them to continue dividing and repairing their bodies without experiencing biological aging in the traditional sense. This phenomenon is sometimes referred to as negligible senescence.

Despite this extraordinary ability to resist cellular aging, lobsters are not immortal. Their continuous growth eventually becomes a vulnerability. Molting, especially for very large and old lobsters, requires immense energy and can become physically exhausting, sometimes leading to death. Additionally, older, larger shells are more susceptible to disease and damage, which can also be fatal. Historically, determining a lobster's age was challenging due to their molting process, which removes traditional age markers like growth rings found in other animals. However, scientists have developed methods, including examining growth rings in internal structures like eyestalks and gastric mills, or even using DNA-based techniques, to more accurately estimate their advanced ages. Some individual lobsters have been estimated to live for over a century, with one notable American lobster named George reportedly reaching an estimated 140 years old.