10 Fun Facts About Squid And Octopus You’ve Never Heard Before


difference between squid and octopus

Both squid and octopus are cephalopods, a group of marine animals that also includes cuttlefish and nautilus. They’re all soft-bodied creatures with tentacles, but there are some key differences between these two popular seafood items. Keep reading to learn more about the difference between squid and octopus!

What is the difference between squid and octopus?

Some say that the main difference between squid and octopus is that squid have a internal shell, while octopus do not. Others say that the biggest difference is that squid are fast swimmers, while octopus are not.

So, what is the difference between squid and octopus? Well, let’s take a closer look.

Squid have a long, cylindrical body with eight arms and two tentacles. Their eyes are large and their bodies are covered in ink. Squid are able to swim quickly by propelling themselves through the water using their fins.

Octopus have a shorter, more compact body than squid with eight arms and no tentacles. Unlike squid, octopus have no internal shell. They also have smaller eyes than squid. Octopus are not strong swimmers but they are excellent climbers.

So, there you have it! The main difference between squid and octopus is that squid have an internal shell and octopus do not. Squid are also better swimmers than octopus but octopus can climb better than squid.

How do they look different?

One of the most obvious differences between squid and octopus is their appearance. Squid have a long, tubular body with eight arms and two tentacles, while octopuses have a shorter, more compact body with eight arms and no tentacles. Squid also have a small internal shell, while octopuses do not have any internal shell at all. This structural difference is due to the fact that squid are related to mollusks like clams and snails, while octopuses are more closely related to crabs and lobsters.

Functionally, the difference between squid and octopus is that squid are faster and more agile swimmers, while octopuses are better at crawling and moving around on land. Squid are also able to squirt out ink when threatened, which can help them escape predators. Octopuses, on the other hand, can change the color of their skin for camouflage and they can also release toxins when threatened.

Nutritionally, there is not much difference between squid and octopus. Both are good sources of protein and low in fat. However, squid does contain slightly more calories than octopus.

From an ecological perspective, squid and octopus play different roles in the ocean ecosystem

What do they eat?

If you’re wondering what the difference is between a squid and an octopus, one of the key distinctions is what they eat. Squid typically eat smaller fish, while octopuses go for crabs and lobsters. This difference in diet can be attributed to the different ways that these creatures hunt. Squid tend to swim in open water, while octopuses prefer to stay hidden in caves or other tight spaces.

Where do they live?

The main difference between squid and octopus is where they live. Squid live in the open ocean, while octopus live in caves or under rocks on the seafloor. This difference in habitat results in different behaviors and adaptations. For example, squid are faster and more agile swimmers than octopus, while octopus can squeeze into tighter spaces.

How do they reproduce?

Octopuses and squid both reproduce in a similar way. They both lay eggs that hatch into little larvae. The larvae then grow and mature into adults. However, there are some differences between the two. For example, squid have internal fertilization while octopuses have external fertilization. This means that the male squid will transfer sperm to the female squid’s body where it will fertilize the eggs. On the other hand, the male octopus will transfer sperm directly to the female octopus’s body (usually via her mouth) and she will then fertilize her own eggs.

What is their lifespan?

Squid and octopuses are both marine animals that live in the water. They are both cephalopods, which means they have a head with eyes and a beak, and their bodies are long and thin. Squid are usually smaller than octopuses, and they have eight arms, while octopuses have two arms and six legs. Squid live for about one to two years, while octopuses can live for up to five years.


From the above discussion, it is evident that there are several key differences between squid and octopus. For one, squid are much larger than octopus and have a distinct head and body. Squid also have ten arms, while octopus have eight. Additionally, squid live in open water and are hunted by humans, while octopus live in denser areas on the ocean floor and avoid human contact. Finally, squid ink is used in cooking, while octopus ink is not typically consumed.