The Queen song ponders “Who Wants to Live Forever,” and the answer is: a jellyfish. Have you ever wondered what it would be like to live forever? Imagine a world where aging is not a concern, and you could simply reset your biological clock. Sure sounds like science fiction, right? Well, this concept is a reality for one unique species in the marine world. Meet Turritopsis dohrnii, also known as the immortal jellyfish.
The concept of biological immortality is fascinating. Imagine a creature that, instead of succumbing to old age or environmental stress, could reverse its life cycle and start anew. This is precisely what Turritopsis dohrnii can do. Found worldwide in temperate to tropical waters, this tiny jellyfish has captured the attention of scientists and biologists alike.
Unveiling the immortal jellyfish
Turritopsis dohrnii, also known as the immortal jellyfish, is a small, bell-shaped jellyfish that rarely grows larger than a few millimeters in diameter. Despite its unassuming appearance, its unique ability distinguishes it from other marine animals. When faced with unfavorable conditions or physical damage, T. dohrnii can revert to its juvenile polyp stage, effectively starting its life cycle anew. This process, known as transdifferentiation, allows it to avoid death and potentially live indefinitely.
The lifecycle of T. dohrnii
Like most hydrozoans, Turritopsis dohrnii begins its life as a tiny, free-swimming larva called a planula. After settling on the sea floor, the planula develops into a polyp colony, which buds off into free-swimming medusae or jellyfish. These medusae grow and mature, eventually becoming sexually mature adults. However, T. dohrnii can remarkably reverse this process, unlike other jellyfish species. When stressed, it reverts to its polyp stage, regenerating and bypassing death.
Also interesting: Startup Designs Jellyfishbot to Eat Water Waste
The implications of T. dohrnii’s biological immortality are profound. This jellyfish provides a unique opportunity for scientists to study aging and cellular regeneration. Understanding how T. dohrnii achieves this feat could potentially unlock new avenues for medical research, particularly in the fields of aging and regenerative medicine.
Biomedical and ecological insights
The study of Turritopsis dohrnii has significant biomedical applications. Researchers are particularly interested in the jellyfish’s ability to undergo transdifferentiation, where its cells transform into different types. This process holds promise for regenerative medicine, which aims to repair or replace damaged tissues and organs. By understanding the mechanisms behind T. dohrnii’s cellular reprogramming, scientists hope to develop new treatments for age-related diseases and injuries.
While T. dohrnii’s immortality is a captivating topic, its ecological impact is also worth noting. This jellyfish plays a role in marine food webs, serving as both predator and prey. It feeds on zooplankton, fish eggs, and small mollusks, using its tentacles to capture and ingest prey. In turn, it is preyed upon by larger marine animals such as sea anemones, tuna, and sea turtles. The ability of T. dohrnii to revert to its polyp stage means that it can potentially spread more easily across different marine environments, contributing to its presence in temperate to tropical waters worldwide.
The intriguing immortal and the singing scientist
The story of Turritopsis dohrnii reminds us of the incredible diversity and adaptability of life on Earth. While the jellyfish’s ability to achieve biological immortality may seem far-fetched, it underscores the potential for groundbreaking discoveries in biology and medicine.
In Japan, one scientist, Shin Kubota from Kyoto University, has managed to keep a colony of these jellyfish alive for extended periods. His dedication to studying T. dohrnii has led him to record songs about them, often performing at the end of his presentations. It’s a testament to the profound impact that this tiny creature has had on the scientific community. Watch one such presentation and singing performance below.
YouTube: Shin Kubota sings a song of immortal jellyfish
By clicking play, you agree to YouTube's Terms of Service and Privacy Policy. Data may be shared with YouTube/Google.
Photo credit: The feature image has been done by Rebecca Schreiner. While it was indicated that the picture shows the immortal jellyfish, we are not able to confirm it, meaning that it could be a different species.
