How Many Hearts Does a Vampire Squid Have?

The vampire squid is an interesting little sea creature. It is called Vampyroteuthis infernalis, which means “vampire squid from hell.” While the name of the sea creature is certainly very terrifying, the animal itself is not. The vampire squid is called so because of its appearance. The flashy name is given to the sea creature only because of the dark red-to-black coloration it has in appearance to cloak-like webbing. Moreover, a vampire squid has toothy spines that further justify the name.

Vampire squids live in complete darkness on the inner surface of the sea, around 2,000 to 3,000 feet deep. Animals are studied best when they are in their natural habitat, so there aren’t a lot of studies on vampire squids. However, in this article, we will look at some of the characteristics of a vampire squid, in addition to looking at how many hearts a vampire squid has. Firstly, let’s look at how vampire squids are classified.

What are Vampire Squids?

Firstly, vampire squids were classified as octopuses in 1903. Ever since they have been classified and reclassified over the years. Later on, they were identified as part of the squid family. However, as more research has been made on the topic, vampire squids were removed from the classification of squids. Today, the retractile sensory filaments of the vampire squids have earned them their own order called the Vampyromorphida.

Vampire Squids

Vampire squids are used to surviving in the aphotic zone of the sea and even deeper, where there is very little oxygen, a lot of pressure, and virtually no light. In the aphotic zone, the only light comes from a variety of bioluminescent organisms like fish, jellyfish, and different types of squids. Of course, the sea creatures living in this environment have adapted to survive in such conditions. The internal and external systems of vampire squids allow them to survive in these conditions.

One of the bodily systems that help vampire squids survive is their cardiovascular system. Now, let’s discuss the cardiovascular system of vampire squids and how it helps them survive the extreme environment of the aphotic zone of the sea.

Cardiovascular System of Vampire Squid

As mentioned above, there is not enough research about vampire squids to establish concrete facts about their internal and external systems. However, because the vampire squid relates a little bit to squids in general, we can assume that vampire squids share the cardiovascular system with their close relatives. The cardiovascular system of these sea creatures is a unique one, seen in squids and other similar sea creatures.

How Many Hearts Does a Vampire Squid Have?

Squids have a circulatory system that consists of a mantle cavity that is filled with water. In this mantle cavity, there are three hearts present that, along with the other organs, perform the function of circulation. The three hearts perform different functions to complete the cardiovascular process in the body of the squid.

Out of the three hearts, one of them is the primary or the “main” heart. This heart is responsible for the major circulatory process of circulating blood throughout the body of the squid. This one of the three is called the systematic heart. The systematic heart consists of three chambers, unlike a human heart, which has four chambers.

Now we might think that the major circulatory process is fulfilled, so what is the need for the other two hearts? Well, the other two hearts, called the branchial hearts, are also responsible for performing a major task for the body of the squid. These two branchial hearts are primarily responsible for providing blood to the gills of the vampire squid. It is through the help of this process that vampire squids and pure squids are able to breathe underwater.

As the branchial hearts send the blood to the gills, it, of course, has to go back to the systematic heart at once. In this way, blood circulates throughout the whole body of the squid. The cardiovascular system of these sea creatures is also interesting for the reason that their blood is blue due to the high copper content.

Although the three-heart circulatory system of squids may seem unfamiliar and unique, multi-heart systems are not uncommon in the animal kingdom. There are a lot of animals and fish that have multiple hearts. Some of these creatures are hagfish and cuttlefish. 


The cardiovascular system of vampire squids, as well as many other creatures living in the aphotic zone, is quite interesting when we look at it. Maybe the conditions of the zone are so scarce that animals and fish have had to adapt to survive in the harsh atmosphere. Whatever the reason is, the circulatory system of vampire squids and pure squids is definitely fascinating.

About the author

Ameer Hamza

Ameer Hamza is a well-versed content writer who has been a part of the writing industry for over 4 years and part of Talha Saif Enterprises as an Author for over a year. Through his love of writing, he has developed his own writing style. He enjoys writing articles and blog posts that provide readers with detailed and accurate information. The knowledge he gained from his education helped him tackle many different subjects without any problem. As an avid reader and technology geek, Ameer is always on the lookout for the latest innovations.