Which animal lives longest?
Which animal lives longest? Giant tortoises often live more than 100 years, but they aren't the longest-living animal its the sponge, below left (Smithsonian.com)
Which animal lives longest?
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Sticking with recorded history, the answer might surprise you. Its not elephants, which live for about 30 or 40 years. Its not giant tortoises either, even though they often ripen to be well over 100 years old. Its not even that record-breaking, 507-year-old Arctic clam named Ming.

Nope, the longest-living animal in the world is a sponge. Sponges are among the simplest animals on the planet headless, armless and completely void of internal organs. But theyre still technically animals. And the glass sponge can live for 15,000 years.

The only other animal that might give it a run for its money is the immortal jellyfish. Under normal circumstances it lives and dies just like any other jellyfish. But put it under extreme stress and guess what? It ages backwards!

It transforms all of its adult cells into a younger state. And it can do this de-aging thing over and over again. Kind of makes the oldest human a 122-year-old French woman who was named Jeanne seem downright young, doesnt it?

Critical thinking challenge: Is there any connection between a 100-year-old tortoise and a 100-year-old human?

Source URL: https://www.tweentribune.com/article/tween56/which-animal-lives-longest/

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  • Brandon1231-YYCA
    5/15/2014 - 07:13 p.m.

    I think that this a thing isn't an animals because, sponges aren't alive and they can't move anywhere, so how do they eat and sleep? I think that they eat by eating microscopic things in the water so they can get bigger and not die. I think Arctic clams are cool and weird because, they can live for a long time with out being dead. I think that this a cool topic to talk about and I think that this can be a coll thing to talk about in school. I think that this can be real thing about animals. I wonder why people think that sponge can be a living animal.

  • WarrenB-4
    5/15/2014 - 07:24 p.m.

    This article is about the oldest living animal that lives the longest. Surprisingly it is a sponge. Not Spongebob SquarePants, an real life sponge. But, it actual has some competition, the regenerating jelly fish. The jelly fish actually rebuilds itself when it is under pressure.

    My opinion about this article was, I thought the oldest living animal species was Clifford the Big Red Dog! I guess I was totally wrong!

  • AidanL-5
    5/15/2014 - 07:35 p.m.

    This article is about the oldest living animals. Many people think that tortoises or clams are the oldest, but they are wrong. The oldest living animals are sponge and jellyfish. Sponge is the most basic creature that could be considered an animal and the glass sponge can live for 15,000 years. Jellyfish on the other hand, while put under extreme stress, age backwards and can repeat the process over and over again.

    I enjoyed this article because I found it cool that jellyfish could age backwards.

  • JocelynS-3
    5/15/2014 - 09:14 p.m.

    This article is about debating whether certain animals can live longer than other types. The animal that can live the longest is one of the most simple animals on the planet, sponge. A spnge can live to be 15,000 years old. Although a jellyfish can also live for a long time, they are very unique. Certain jellyfish can reverse their age and go into a younger state. This is interesting that the simplest animals can live very long.

  • JohnP-4
    5/15/2014 - 09:50 p.m.

    I never would have thought that a sponge would be the oldest animal on the planet but I suppose sponge bob square pants will be pretty happy. A sponge can live for up to 15,000 years which makes them older than any other animal on the planet. There is an animal that could possibly live longer known as the immortal jellyfish it can randomly have Benjamin Button's disease and make it's adult cells into baby cells but it will only do this under extreme stress.

  • BaileyD-1
    5/15/2014 - 10:16 p.m.

    The longest living animal. Not elephants. Not the tortoise. Not the 507 year old arctic clam. It's the sponge. Particularly the glass sponge. The glass sponge can live for 15,000 years. This creature is among the simplest with no arms, legs, face, or organs, but still is an animal. There is only one animal that might give it a run for the title. The immortal jellyfish, which can age backwards. I think that any animal that can live over 100 years old is amazing especially when us humans are changing natural environments so much.

  • MaysenM-3
    5/15/2014 - 10:52 p.m.

    This article is about how the oldest animal in the world may not be what you think it is. It isn't the elephant, Arctic clam, or even tortoise. It's the sponge! Sponges are quite simple, they are headless, armless, and completely void of internal organs. The glass sponge can live for 15,000 years, even beating the immortal jellyfish. When put under stress, the immortal jellyfish ages backwards! It can transform all of its adult cells into a younger state, over and over again. The oldest human was 122 years old, a French woman named Jeanne. I think this is very intriguing, as I didn't know jellyfish could be immortal, or that sponges could live to be 15,000 years old!

  • VictoriaH-3
    5/15/2014 - 11:42 p.m.

    Elephants and tortoises may seem like the animals who can outlive anything, but they're not even close to the longest known living animal in the world. This animal is a sponge. The sponge has no head, arms, or even internal organs, but they are still considered animals. The sponge, more specifically the glass sponge, can live up to about 15,000 years. The only other animal that can almost reach that point of age is the jellyfish, who can age to a younger state repeatedly. I think the fact that a sponge can outlive pretty much everything on earth is pretty incredible. This is because it outlives other animals and humans by about 14,000 years!

  • ChrisP-5
    5/15/2014 - 11:49 p.m.

    This article is about the longest living type of animal. The longest living animal is very surprising. It is a sea sponge. The sea sponge is said to live thousands of years. One type of sponge called the Glass Sponge can live to 15,000 years old! One other animal that is up with the sponge is the jellyfish. I think this is very cool because I have always wanted to know about what animal lives the longest, and now I know.

  • AndreN-3
    5/16/2014 - 12:20 a.m.

    There are many long-lasting animals out there. There are elephants, giant tortoises, and even the 507 year old Arctic clam named Ming. But the oldest of them all? A sponge, which can live up to 15000 years. The only other animal that could possibly surpass the sponge in the aging arena would be the immortal jellyfish which, if faced with extreme levels of stress, could age backwards! I think that it is crazy that animals could live for so many years. I always thought it was the lobster that lived the longest, I heard that they can never die from natural causes like aging.

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