To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii.
They found that, on average, male European lobsters live to 31 years old, and females to 54. There were a few exceptions: one female had reached 72 years old. Lobsters certainly do not live forever. It's not entirely clear where this myth originated, but it is a claim that persists online, often in the form of memes.
Sturdy turtles
Slow and steady really does win the race. Turtles have been known to live for centuries, and researches have found that their organs don't seem to break down over time. The New York Times reports that turtles might even be able to live indefinitely if they are able to avoid predators and disease.
The hydrozoan Turritopsis dohrnii, an animal about 4.5 millimetres wide and tall (likely making it smaller than the nail on your little finger), can actually reverse its life cycle. It has been dubbed the immortal jellyfish.
A tiny jellyfish named Turritopsis dohrnii is capable of living forever, Motherboard reports. Only discovered in 1988, the organism can regenerate into a polyp—its earliest stage of life—as it ages or when it experiences illness or trauma.
The percentage of genetic similarities between humans and animals does vary: chimps, 97% similar; cats, 90%; cows, 80%; mice, 75%; fruit flies, 60%, and jellyfish, 60%.
However, because jellyfish are soft-bodied and almost all water, jellyfish fossils are incredibly rare. Of those that do exist, the oldest-known jellyfish fossils, found in Utah, date to 505 million years ago and have enough detail to show clear relationships with some modern species of jellyfish.
Can jellyfish feel pain? Jellyfish don't feel pain in the same way that humans would. They do not possess a brain, heart, bones or a respiratory system. They are 95% water and contain only a basic network of neurons that allow them to sense their environment.
Their skin is so thin that they can absorb oxygen right through it, so they don't need lungs. They don't have any blood so they don't need a heart to pump it. And they respond to the changes in their environment around them using signals from a nerve net just below their epidermis — the outer layer of skin.
4. Clams. Believe it or not, some clams can live up to more than 400 years. Scientists explain that their long lifespan can be attributed to a process called “slowed cell replacement” but at present, there are still no reasons stating what makes them mature at a slow rate.
But the bullfrog, Lithobates catesbeianus show the same reaction in both situations. This indicates that bullfrogs do not sleep. Lithobates catesbeianus is an animal that cannot sleep.
Flatworms, nematodes, and cnidarians (jellyfish, sea anemones, and corals) do not have a circulatory system and thus do not have blood. Their body cavity has no lining or fluid within it.
No rest for the Bullfrog. The bullfrog was chosen as an animal that doesn't sleep because when tested for responsiveness by being shocked, it had the same reaction whether awake or resting.
Many ocean-dwellers like some starfish and octopuses have the capacity to extend their life, thanks to regeneration.
Most likely, yes, say animal welfare advocates. Lobsters belong to a family of animals known as decapod crustaceans that also includes crabs, prawns, and crayfish.
The oldest lobster in the world was named George and its estimated he was an incredible 140 years old, making him older than any human (the oldest human on record was 122 years old). George is an Atlantic lobster and was caught off the coast of Newfoundland, Canada, in 2008.
Jellyfish can sting if they brush against you when you're swimming in the ocean. You also can get stung if you step on a jellyfish, even a dead one. Usually, jellyfish stings will hurt, but are not emergencies.
Jellyfish are usually either male or female (with occasional hermaphrodites). In most cases, adults release sperm and eggs into the surrounding water, where the unprotected eggs are fertilized and develop into larvae.
Jellyfish are not very smart. “They have very simple sensory organs, and no brain to process any information,” says marine biologist Stein Kaartvedt. Which is why it's so interesting that, off the coast of Norway, scientists have observed what they're calling “apparent social behavior” in the helmet jellyfish.
Jellyfish are eaten by seabirds, turtles, and crabs. Grey triggerfish, ocean sunfish, seabirds, turtles, whale sharks, crabs, and whales eat jellyfish naturally. However, the main predators of jellyfish are usually other different types of jellyfish.
As explained by plant biologist Dr. Elizabeth Van Volkenburgh, all living organisms perceive and respond to painful touch, but plants do not perceive or “feel” pain the same way that animals do because they lack a nervous system and brain.
Quite simply, no. There is no truth to the myth that peeing on a jellyfish sting can make it feel better. Numerous studies have found that this simply doesn't work. One of the possible reasons that this myth became popular could be due to the fact that urine contains compounds like ammonia and urea.
The oldest dog living is Gino Wolf (USA, b. 24 September 2000), who is 22 years 52 days as verified in Los Angeles, California, USA, on 15 November 2022. Gino was adopted by Alex Wolf in Boulder, Colorado, in 2002.
SEA FOREST: Approximately 200,000 years. A sprawling sea grass meadow ten miles long near Spain ranks as the oldest known single organism on Earth, according to geneticists. Posidonia oceanica, known as Neptune's grass, is endemic to the Mediterranean Sea.
Coelacanths, first swam in the ocean about 400 million years ago and were believed to be extinct until one was caught off South Africa in 1938.