The Sign Eviota, Eviota sigillata, a tiny
The dainty mayfly, an insect found worldwide in clean freshwater habitats, lives for just one or two days, the shortest lifespan of any known animal. They don't even have mouths as they feed in the air.
#1: Mayfly — The Shortest Lifespan of Any Known Animal
These insects are the shortest living animals on the planet, as the adult lifespan of a fly from this species is only 24 hours.
Estimates of sponge longevity vary quite a bit, but are often in the thousands of years. One study in the journal Aging Research Reviews notes a deep-sea sponge from the species Monorhaphis chuni lived to be 11,000 years old. Yes, a sponge is an animal—and it has a remarkable life-span.
Mayflies only live for 24 hours and hold the record for the shortest living life cycle on earth. This might be good news to anyone who hates bugs, but not all bugs have short lifespans. There are a few bugs that can live for years, even decades.
Scholars have long recognised that the survival value of pain means many animals experience it, supposedly with the exception of insects. But we surveyed more than 300 scientific studies and found evidence that at least some insects feel pain.
The horsefly has the longest lifespan with a maximum of 60 days. The peskiest of species to humans, the common housefly, lives up to one month.
Oldest animal ever
The longest-lived animal ever discovered is a quahog clam, estimated to be 507 years old. It had been living on the seabed off the north coast of Iceland until it was scooped up by researchers in 2006 as part of a climate change study.
Oldest living creature on Earth identified, emerging 700 million years ago. Scientists have announced that the oldest living creature on our planet is a jellyfish-like organism called a ctenophore. It evolved from the same primordial animals that humans did.
Studies show that some corals can live for up to 5,000 years, making them the longest living animals on Earth. Some corals can live for up to 5,000 years, making them the longest living animals on Earth.
The life expectancy of a housefly is generally 15 to 30 days and depends upon temperature and living conditions. Flies dwelling in warm homes and laboratories develop faster and live longer than their counterparts in the wild. The housefly's brief life cycle allows them to multiply quickly if left uncontrolled.
The increased longevity of humans is, in part, attributable to environmental changes; improved food, water, and hygiene; reduced impact of infectious disease; and improved medical care at all ages.
Some fish, such as some varieties of sturgeon and rougheye rockfish, and some tortoises and turtles are thought to be negligibly senescent, although recent research on turtles has uncovered evidence of senescence in the wild.
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Towering above the grasslands of Africa, giraffes are the tallest land mammal in existence, sometimes exceeding 18 feet in height. Giraffes are social animals that roam the savannah peacefully in large herds.
According to tree-ring data, Methuselah is 4,853 years old — meaning it was well established by the time ancient Egyptians built the pyramids at Giza. And while Methuselah's precise location is kept under wraps to protect it from harm, there's much we do know about this living relic.
In compiling this list, we accepted the owner's word as reported in the media for the age of their beloved animal. The oldest cat ever was named Creme Puff who passed away aged 38 years and 3 days. Read on to see the top 10 list of oldest cats ever! If playback doesn't begin shortly, try restarting your device.
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.
Regenerating flatworms
This apparently limitless regeneration also applies to aging and damaged tissue, allowing the worms to cheat death indefinitely, according to a study at the University of Nottingham.
CONQUEIROS, Portugal (AP) — The world's oldest dog recently celebrated his 31st birthday, according to Guinness World Records. Bobi, a purebred Rafeiro do Alentejo, a breed of Portuguese dog, celebrated during a party Saturday at his home in the Portuguese village of Conqueiros, where has lived his entire life.
In the process the clam died. Professor Richardson said that the existence of such long-lived species could help scientists discover how some animals reach such advanced ages. The mollusk's long life came to an end in 2006 when the researchers – unaware of the animal's exceptional age – froze the specimen, killing it.
The wealth of data collected for the project corroborated earlier evidence that insects likely evolved from a little-known group of venomous crustaceans called remipedes.
Ming the clam was first discovered in 2006 and killed by scientists unaware of its age. Recent advances have revised Ming's age upwards by 103 years.
As far as entomologists are concerned, insects do not have pain receptors the way vertebrates do. They don't feel 'pain,' but may feel irritation and probably can sense if they are damaged. Even so, they certainly cannot suffer because they don't have emotions.