10 Weakest Animals in the World That’s Strong Enough to Survive

Have you ever thought about what the weakest animal in the World is? It’s difficult to say because of how many different factors you have to consider—size, lifespan, weight, diet, hunting, and most importantly, defending abilities, etc.

But after examining all the different possibilities, I’ve come up with a list of ten of the most vulnerable animals on the planet. So in this article, I will discuss the animals that are too weak and defenseless to survive.

If you thought the animal kingdom was just all about survival of the fittest, think again! These weakest animals are proof that they don’t have to be strong to survive; They have to be lucky enough to avoid getting eaten by something bigger than them!

Let’s dig in.

10 Weakest Animals in the World

In my research, I have found that zooplankton is the most defenseless and weakest. They are not capable of moving. In the ocean full of small fishes, they are the easiest prey.

In nature, every creature has its role and place. When most people think of the weakest animals in the World, they probably think of the smallest or the least aggressive species. But, unfortunately, it also means that this animal has a hard time surviving.

Here is the list of the weakest animals in the world.

NumberAnimal NameInformation
1ZooplanktonThis microscopic animal is doesn’t have the ability to move.
2Jellyfish They are too weak to support their body weight.
3EarthwormsSlow and weak to defend itself.
4TarsiersSmall and defenseless.
5FairyfliesAn easy target for nocturnal birds.
6ChickensCan’t fly and is weak.
7Spiny Softshell TurtleHas soft rubbery shell.
8Star-Nosed MoleHas poor eyesight.
9AntsSmall animals when lots of predators.
10SlothsThe laziest animal
weakest animals in the world


Zooplankton Picture: The weakest animal in the world

Small, usually microscopic animals float around in the water. Zooplankton relies on both sunlight and nutrients from other animals to survive.

In addition to being essential food for other aquatic animals, zooplankton can also be eaten by birds and fish. However, they play important ecosystem functions like decomposing fish waste or absorbing carbon dioxide.


Jellyfish: too weak to support their body weight.

While it’s true that jellyfish are among some of the most beautiful animals in our oceans, they’re also among some of its most helpless.

On top of being largely defenseless against predators, they also have a highly unspecialized body plan and lack any skeletal structure—meaning their tissues and organs don’t have the means to support them when exposed to pressure changes or physical stress.


Earthworms are slow and weak to defend itself.

Earthworms are fascinating organisms that play an important role on our planet by recycling nutrients and improving soil quality. But, unfortunately, these creatures are slow-moving, don’t have eyes, ears, brains, bones, or teeth.

Besides, worms will be on the top if you analyze the birds and carnivorous animal food lists. Their high food chain position is that they are very easy to catch, while their meat is nutritious.



The tarsier has a protruding, big eye to prey on insects, snakes, lizards, and frogs. Tarsiers are most active at night when they search for food. Despite their name, they are more closely related to lemurs than monkeys or apes.

However, if a tarsier has to defend itself from a predator, it will shed tears to distract its attacker while it escapes.


Fairyflies are some of the smallest insects around, but their small size is only part of their weakness. They also have very short lifespans; after hatching, they’ll die within 48-72 hours.

Their bodies are tiny and fragile, making them susceptible to predators like spiders or wasps, and fairyflies can’t protect themselves. All of these factors make them one of the weakest animals on Earth.


It’s no secret that chickens are weaker than some other animals. What might surprise you is how fragile they are. Compared to other birds, chicken wings aren’t built for flapping.

While chickens may attack, they are also weak and vulnerable, especially when predators like foxes, eagles, and snakes.

Spiny Softshell Turtle

Spiny Softshell Turtle

The spiny softshell turtle (Apalone spinifera) is the only freshwater turtle in North America, making it vulnerable to habitat destruction, threats from non-native species, and overharvesting.

But, this is not why it is on the list. They have a softer shell than any other turtle (soft and rubbery). Besides, as like other turtles, they are slow. That makes it one of the easiest prey to its predators.

Star-Nosed Mole

Star-Nosed Mole

The star-nosed mole is a small, pink, semi-aquatic North American mole found along lakes and streams. It has poor eyesight, but its other senses make up for it. Its sense of smell is very strong and can detect underwater objects from great distances.

Given that they have a strong sense of smell, these animals have little difficulty tracking their prey and use their nose as a built-in tool for digging.


Ants are weak but survived

The ants are extremely weak creatures that are very much weaker than other animals. Still, ants can survive in any difficult situation.

They have lots of predators like birds. Besides, they can’t source foods in winter. However, they are one of the most social animals, working hard in summer to survive bad weather.


Sloth are weak and lazy

Sloths are slow-moving, tree-dwelling mammals known for their sedentary lifestyle and low-energy diet. Besides, they are also one of the laziest animals in the World.

These sloths have been living in this manner for thousands of years, so what’s the big deal? There are several scientific reasons why sloths are weak and vulnerable in the wild.

The sloth’s inability to escape predators is often chalked up to laziness. However, they can be dangerous and attack predators. However, due to inactivity, they are one of the easiest hunt for humans.

Final Words

There are many other examples of weak animals, and these are the topmost weak ones. However, some list contains humans as the more helpless animal. Well, I don’t see it this way.

Though physical strength may suggest that we are weak, humans are the most intelligent animal and stronger than most animals. Besides, we are the ones who can hunt or trap any other animals.

The animal kingdom is full of extremes, with some species growing to enormous sizes. At the same time, others are barely bigger than an average ant. It’sIt’s important to remember that just because an animal looks weak doesn’t mean it can’t survive in the wild.

About Kate Bruce

I'm Kate Bruce, the animal enthusiast, head of content publishing team at Animallists.com. I've traveled the globe to connect with all kinds of creatures. I'm here to share insights and tips about the animal kingdom, whether you're a newbie or an experienced enthusiast. Get in touch at kate@animallists.com, and let's explore the world of animals together!

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