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6 Animals with Multiple Hearts (A to Z List with Pictures)

animals with multiple hearts

Animals with multiple hearts include Cockroaches, Cuttlefish, Earthworm, Hagfish, and Octopus.

There are numerous different species of animals that have multiple hearts and can be found all over the world. Some of them are pretty surprising.

Because it isn’t required for most creatures to have more than one heart, having multiple hearts is quite unusual.

This implies that it occurs rarely and that animals with many hearts are extremely rare. Animals with several hearts have been able to adapt and thrive owing to the fact that they were provided with an extra heart or in certain cases numerous extra cardiac systems.

Examples of Animals with Multiple Hearts

1. Cockroach

cockroach
Scientific NameBlattodea
Type of AnimalInsect
RangeWorldwide
DietOmnivore
Number Of Hearts13

The cockroach is one of the most well-known creatures with multiple hearts. In fact, they have 13.

That’s because these little critters can survive for a long time without food or water and they’re pretty hard to kill. Their extra hearts help them stay alive in harsh conditions.

Cockroaches can also withstand a lot of radiation. They’re known to be able to survive in areas with high levels of nuclear fallout like Chernobyl.

Cockroaches are also one of the few creatures that can survive a nuclear blast. In fact, they’re so hearty that scientists are using them to study how radiation affects living things. Cockroaches have even been sent into space to see how they’ll fare on other planets.

See Also: What does it mean when a cockroach crawls on you?

2. Cuttlefish

Cuttlefish
Scientific NameSepiida
Type of AnimalFish
Rangethe Mediterranean, North and Baltic sea
DietCarnivore
Number Of Hearts3

Cuttlefish is one of the most fascinating creatures with multiple hearts. These animals have three hearts in total- two of which pump blood through their bodies and the third that pumps blood to their gills.

This allows them to keep swimming even when they are oxygen-deprived, which is a pretty big advantage in the wild.

In addition to their multiple hearts, cuttlefish also have an amazing ability to change color. They can blend in with their surroundings or create bold patterns to communicate with other members of their species. This makes them very successful predators and prey.

3. Earthworm

Earthworm
Scientific NameLumbricina
Type of AnimalAnnelida
RangeWorldwide
DietOmnivore
Number Of Hearts5

The humble earthworm is one of the animals with multiple hearts. Believe it or not, these creatures have five! Their extra hearts help them to move around and survive in their environment. When an earthworm gets scared or stressed out, its primary heart will start beating faster.

This will cause blood to flow to the other four hearts, which will then start beating faster as well. This process allows the earthworm to escape quickly from danger.

Earthworms also do not have lungs. Instead, they breathe through their skin. However, their skin needs to be moist enough in order for them to do so. If it isn’t wet enough, the worms can suffocate within as little as 15 minutes!

Their blood is also blue and doesn’t contain hemoglobin like ours does. This is because their natural habitat is underground where there is little sunlight.

4. Hagfish

Scientific NameMyxini
Type of AnimalFish
Rangecoasts of the North Pacific
DietCarnivore
Number Of Hearts4

The hagfish is another strange creature that has multiple hearts. This fish has a heart on each side of its body, for a total of 4. These extra hearts help the hagfish to keep moving even when it’s been injured. When one of the hagfish’s regular hearts stops beating, the other will take over and keep the fish alive.

Hagfish live in oxygen-poor water, so their hearts can pump for up to 36 hours with no oxygen. This is an important adaptation since the hagfish can’t come to the surface for air.

The hagfish has a unique defense mechanism: it will excrete slime from its body. This slimy substance coats predators and makes them unable to bite or swallow the fish. Hagfish can also use their slime to escape from tight spots.

Hagfish are scavengers and can eat things that other fish can’t. They have a specially adapted digestive system that allows them to digest bone, feathers, and even skin. Hagfish are often called “the vampires of the sea” because they feed on the carcasses of dead animals.

5. Octopus

Blue-Ringed Octopus
Scientific NameOctopoda
Type of AnimalInvertebrate
RangeWorldwide
DietCarnivore
Number Of Hearts3

The octopus is another interesting creature with multiple hearts. It has three hearts in total – two of which pump blood to the octopus’ gills and one that pumps blood around its body. This allows the octopus to stay underwater for a long time without having to come up for air.

The octopus is also able to change its color and texture, which helps it to blend in with its surroundings. This makes it difficult for predators to spot the octopus, giving it a better chance of escaping. Octopuses are usually shy creatures and will only attack if they feel threatened.

Despite their small size, octopuses are very intelligent creatures and can learn how to open jars, for example. They have also been known to use tools, such as rocks, to help them catch prey. This makes them one of the smartest invertebrates in the world.

6. Squid

Squid
Scientific NameDecabrachia
Type of AnimalMollusk
RangeWorldwide
DietCarnivore
Number Of Hearts3

The squid is a cephalopod with three hearts. Two of these hearts pump blood through the gills, while the third circulates blood throughout the body. This extra heart helps to keep the squid’s ink sacs filled with black ink, which it uses for defense. When threatened, the squid can release its ink and escape quickly.

The squid has two sets of tentacles. The longer, thinner tentacles are used for catching prey, while the shorter, stouter tentacles help the squid to move around and hold onto things. Squid can swim quickly by using a jet of water from their funnel-shaped mantle.

Squid are found in all the world’s oceans, from the surface to the deep sea. They mostly eat small fish, but they will also eat shrimp, crabs, and other invertebrates. Squid is a popular food item, and they are also used in research because of their interesting biology.

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