Difference Between Squid and Octopus

Difference Between Squid and Octopus

The octopus and squid are some of the most common creatures that we see in our ocean. They aren’t just popular for their good looks, but for the incredible abilities, they possess. Many people consider them the same but in reality, they aren’t the same, not at all. Both squid and octopuses are ocean-dwelling cephalopods, but there are a few major differences between the two. There’s a difference between squid and octopus.

Difference Between Squid and Octopus

Octopuses have eight arms whereas squid have ten, and octopuses have a hard beak while squid does not. Octopus also prefers to eat crab and shrimp while squid prefers to eat herring and shrimp. Squid and octopus are both very smart and can find their way back to a home after being left there at random.

These two animals also have an incredible ability to change their skin color to camouflage themselves against different backgrounds. Squid and octopus are two types of cephalopods, which is a class of invertebrate animals. Squids are less intelligent than octopuses because they lack the large brain that octopuses possess.

Octopuses have eight limbs that they use for locomotion instead of the squid’s two. Octopuses also have an ink sac that squids lack, which is used to evade predators. Squid and octopus are cephalopods that are classified in the mollusk class. Squid are typically found at depths of 400-1200 meters while octopuses may be found in shallower waters.

The body of the squid is divided into two parts, one being ahead with tentacles, which can sometimes also have suckers on it which they use to grab their prey. They differ from octopuses because they have 8 arms while octopuses have 6 only.

Another main difference between squid and octopus is their life expectancy. In view of their size, both have a decent lifespan. Squids usually live between 9 months to 5 years, whereas octopuses can survive between 1 to 3 years.

Main Difference Between Squid and Octopus

 SquidOctopus
ClassCephalopoda
Found InSaltwater, open oceanSaltwater, dens of the seafloor
AnatomyMantle, head, 2 fins, 8 arms, 2 tentacles with hooks and sucker rings.Mantle, head, 8 arms with 1 or 2 rows of suckers without hooks.
SizeUp to 60cm (average squid) 13 to 20m1cm to more than 5m
Lifespan9 months to 5 years1 to 3 years
Food SourceFish and ShrimpBottom-dwelling crustaceans