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STRANGEST Regenerating Animals
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From unexpected mammals and sharks … to crustaceans and amazing amphibians ... Here are 17 of the strangest regenerating animals
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#9 Spiny Mouse
Our third mammal with regenerative powers is this humble beast. The little critters have a method of escaping predators that is unique among mammals. When in the clutches of an aggressor they will release chunks of their skin to get away. But that missing skin is later regenerated along with their fur, cartilage, and sweat glands. Only minimal scarring can be detected after the skin is regrown. There’s a theory that humans might possess similar genes that could allow for regeneration.
#8 Sea Cucumbers
For the record, their common name is inspired by their resemblance to the cucumber fruit.
And while you might like the taste of the fruit, you wouldn’t like the taste of a Sea cucumber. They’re packed with toxins, and that’s a big reason why predators usually avoid them. But if the creature is threatened, it has a couple of unappetizing ways to defend itself. Some species will break off their limbs for protection. Later, those lost appendages will regenerate. Some animals have a more extreme response to a threat. They’ll self-liquify their internal organs and then jettison them through the backside. The predator is entangled in the detritus (deh-TRIE-tus) long enough for the cucumber to escape. Within a few weeks, the animal’s guts will regrow.
#7 Basket Star
They appear like a mass of seaweed, and some people have even thought they were alien life forms. But they are marine invertebrates that create unusual, abstract patterns with their tendrils. Did you know these creatures can regenerate themselves by splitting their bodies apart? It’s a form of asexual reproduction where each half will develop into a new and separate organism.
#6 Hail, Hydrozoan! (hie-droh-ZOH-un)
These minute (mine-YOOT) freshwater organisms measure about 15 millimeters and are related to jellyfish. Noted for their remarkable regenerative ability, the Hydra has a protein that seems to counter the effects of aging at the cellular level. Scientists still aren’t clear on how it all works. What is known, is that the hydra can regenerate significant portions of its body after an accident. The ability inspired a reference to the mythological Hydra, which could regrow its decapitated heads. It’s unknown how long the creatures can live. Some experts say that barring disease, the Hydra could live for 10,000 years, if not indefinitely!
#5 Planarian Flatworms
These creatures are often cited as textbook examples of animals that can regenerate lost body parts. If the worm is split apart horizontally or vertically, it will re-generate as two separate animals. Experiments have shown that the newly regenerated individuals could even possess the same long-term memories of the original specimen. If so, scientists say that it could prove that the creature’s memory is transferred through a chemical process.
#4 Salamanders
These amphibians are sometimes mistaken for lizards. And the resemblance can extend to their respective abilities to regenerate. Unlike those reptiles, salamanders can regenerate more than their tails. They can regrow lost limbs within a few weeks, along with other body parts that have been damaged. More complex tissues like the eye retina are also commonly regenerated. And according to experts, salamanders can do this indefinitely. Not unlike some other animals on this list, scientists are trying to reverse engineer the salamander’s regenerative abilities for applications in human medicine.
#3 Newts
Remember how we said that salamanders are mistaken for lizards? Sometimes newts are mistaken for salamanders, of which they comprise a subfamily of about 100 species. Like their cousins, newts can regenerate limbs, spinal cords, hearts, intestines, eyes, and their upper and lower jaws. No surprise that amphibians like newts exhibit the highest regenerative capabilities of any four-footed vertebrates.
#2 Snail Fur
Did you know that snails have fur? They really don’t. ‘Snail fur’ is the common name of a tiny marine animal that grows on the shells of hermit crabs, giving them a furry appearance. It’s a species of hydroid that’s no bigger than a human eyelash that has a trunk and a head used for catching food. Sometimes their heads are used for food by grazing fish. But whenever this little beast is decapitated, no worries. Their noggins will regenerate within a week, complete with a full head of hair. That caught the attention of scientists who are trying to unravel the mystery of this primitive creature’s regenerative abilities. Once that’s figured out, the answer might hold the key to regenerating tissue in humans.
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Let's Connect
#9 Spiny Mouse
Our third mammal with regenerative powers is this humble beast. The little critters have a method of escaping predators that is unique among mammals. When in the clutches of an aggressor they will release chunks of their skin to get away. But that missing skin is later regenerated along with their fur, cartilage, and sweat glands. Only minimal scarring can be detected after the skin is regrown. There’s a theory that humans might possess similar genes that could allow for regeneration.
#8 Sea Cucumbers
For the record, their common name is inspired by their resemblance to the cucumber fruit.
And while you might like the taste of the fruit, you wouldn’t like the taste of a Sea cucumber. They’re packed with toxins, and that’s a big reason why predators usually avoid them. But if the creature is threatened, it has a couple of unappetizing ways to defend itself. Some species will break off their limbs for protection. Later, those lost appendages will regenerate. Some animals have a more extreme response to a threat. They’ll self-liquify their internal organs and then jettison them through the backside. The predator is entangled in the detritus (deh-TRIE-tus) long enough for the cucumber to escape. Within a few weeks, the animal’s guts will regrow.
#7 Basket Star
They appear like a mass of seaweed, and some people have even thought they were alien life forms. But they are marine invertebrates that create unusual, abstract patterns with their tendrils. Did you know these creatures can regenerate themselves by splitting their bodies apart? It’s a form of asexual reproduction where each half will develop into a new and separate organism.
#6 Hail, Hydrozoan! (hie-droh-ZOH-un)
These minute (mine-YOOT) freshwater organisms measure about 15 millimeters and are related to jellyfish. Noted for their remarkable regenerative ability, the Hydra has a protein that seems to counter the effects of aging at the cellular level. Scientists still aren’t clear on how it all works. What is known, is that the hydra can regenerate significant portions of its body after an accident. The ability inspired a reference to the mythological Hydra, which could regrow its decapitated heads. It’s unknown how long the creatures can live. Some experts say that barring disease, the Hydra could live for 10,000 years, if not indefinitely!
#5 Planarian Flatworms
These creatures are often cited as textbook examples of animals that can regenerate lost body parts. If the worm is split apart horizontally or vertically, it will re-generate as two separate animals. Experiments have shown that the newly regenerated individuals could even possess the same long-term memories of the original specimen. If so, scientists say that it could prove that the creature’s memory is transferred through a chemical process.
#4 Salamanders
These amphibians are sometimes mistaken for lizards. And the resemblance can extend to their respective abilities to regenerate. Unlike those reptiles, salamanders can regenerate more than their tails. They can regrow lost limbs within a few weeks, along with other body parts that have been damaged. More complex tissues like the eye retina are also commonly regenerated. And according to experts, salamanders can do this indefinitely. Not unlike some other animals on this list, scientists are trying to reverse engineer the salamander’s regenerative abilities for applications in human medicine.
#3 Newts
Remember how we said that salamanders are mistaken for lizards? Sometimes newts are mistaken for salamanders, of which they comprise a subfamily of about 100 species. Like their cousins, newts can regenerate limbs, spinal cords, hearts, intestines, eyes, and their upper and lower jaws. No surprise that amphibians like newts exhibit the highest regenerative capabilities of any four-footed vertebrates.
#2 Snail Fur
Did you know that snails have fur? They really don’t. ‘Snail fur’ is the common name of a tiny marine animal that grows on the shells of hermit crabs, giving them a furry appearance. It’s a species of hydroid that’s no bigger than a human eyelash that has a trunk and a head used for catching food. Sometimes their heads are used for food by grazing fish. But whenever this little beast is decapitated, no worries. Their noggins will regenerate within a week, complete with a full head of hair. That caught the attention of scientists who are trying to unravel the mystery of this primitive creature’s regenerative abilities. Once that’s figured out, the answer might hold the key to regenerating tissue in humans.
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