Giant Squid vs Blue Whale: Comparing Two Giants

Regarded as some of the largest animals in our oceans, which creature is bigger: the giant squid vs blue whale? While blue whales are well-studied, very little is known about giant squid. But just how large is the giant squid in comparison with the blue whale, and how do both of these creatures get this large? 

In this article, we will compare and contrast the blue whale and the giant squid so that you can have a true understanding of just how large both of these creatures actually are. In addition, we will go over their diets and potential predators, so that you can learn everything there is to know about the average life of both of these creatures. Let’s get started now! 

This post was updated on September 4, 2025 to clarify giant squid length and mantle measurements, along with blue whale diet and weight.

Comparing Giant Squid vs Blue Whale

Key Differences Between Giant Squid vs Blue Whale

There are many key differences between the size of a giant squid and the size of a blue whale. For example, the average blue whale is almost double the length of the average giant squid. In addition, the giant squid faces more predators than the average blue whale, likely given its smaller size. Finally, the blue whale weighs significantly more than the average giant squid. 

Let’s take a look at all of these figures and other details now. 

Giant Squid vs Blue Whale: Length and Height

While the giant squid is indeed a giant, the blue whale is far larger than the giant squid, in both length and height, as well as weight. But just how much larger is the blue whale compared to the average giant squid?

On average, the giant squid ranges in length from 33 to 43 feet long, while the average blue whale reaches 80 to 100 feet long. Some reports have suggested giant squids could reach up to 66 feet in length, but most confirmed specimens are significantly smaller, and no wild-caught individuals have been reliably measured at this size. Even with this in mind, the blue whale is still much larger in length compared to the average giant squid. 

Additionally, the height of the blue whale is much taller than the height of the average giant squid. For example, the blue whale reaches a maximum height of roughly 15 feet tall, while the giant squid reaches 5-7 feet tall with a mantle length of 6.5 feet. 

Giant Squid vs Blue Whale: Weight

When you consider the fact that the giant squid reaches such long lengths due to its tentacles, you may be wondering just how much this creature can weigh. On average, the giant squid weighs significantly less than the blue whale, and the difference is indeed staggering. Let’s take a closer look at the figures now. 

Depending on gender and age, the average blue whale weighs a maximum of 100 tons, while the giant squid only weighs 200 to 600 pounds on average. When you consider the large and imposing skeletal structure of the blue whale compared to the chitin makeup of the giant squid, it only makes sense that blue whales weigh so much more! Even though these two creatures average closer in length than you might suspect, their weight differences are staggering. 

Giant Squid vs Blue Whale: Diet

You may be wondering what exactly the giant squid and the blue whale need to eat to reach such large sizes. Both of these sea creatures eat similar diets, though the blue whale prefers krill, while the giant squid eats shrimp and fish. But how much do both of these creatures need to eat in a day in order to survive? Let’s find out! 

Recent studies suggest that blue whales can eat between 6 and 16 tons of food per day, depending on their size and location, while it is unknown just how much the giant squid eats on average. However, given the fact that other squid species frequently consume up to 30% of their body weight in a single day, the giant squid may indeed be eating roughly 180 pounds of food in a day!

Giant Squid vs Blue Whale: Predators

Both the blue whale and the giant squid have very few natural predators, though the giant squid faces more threats on average compared to the blue whale. For example, blue whales only need to worry about humans as their primary threats once they reach adulthood, though the giant squid has to worry about sperm whales throughout its entire life. 

Additionally, both the giant squid and the blue whale face the orca or killer whale as threats. While orcas most commonly target young blue whales, there have been rare, documented cases of orcas attacking and killing adult blue whales as well. Giant squids are frequently targeted and consumed by different whale species as well as sharks, and humans also interfere with their typically peaceful lives underwater.

Giant Squid vs Blue Whale: Size Comparisons

When it comes to recognizing just how large the giant squid and the blue whale are, sometimes size comparisons can be helpful. For example, the average blue whale is roughly two and a half school buses in length while the giant squid averages only a single school bus in length. In addition, the giant squid is roughly the same weight as the average V8 engine, while the blue whale weighs the same as 5-6 large school buses (assuming each bus weighs 16 tons).