Fun Seven-arm Octopus Facts For Kids

Iram Ashfaq
Feb 13, 2023 By Iram Ashfaq
Originally Published on Aug 31, 2021
Edited by Monisha Kochhar
Fact-checked by Sakshi Raturi
A list of the most astonishing seven-arm octopus facts for you and your family.

The seven-arm octopus is one of the most fascinating creatures in the ocean.

It has an incredible ability to change color, camouflage itself from predators and prey alike, and taste with acetabular on its arms that are located near its mouths as well as powerful muscles which give it a range of movements when swimming.

These octopuses can also funnel water into their internal organs or use suckers around them for catching food such as crabs!

The octopus is known as the 'smartest invertebrate on Earth.'

The seven-arm octopus is a deep-sea organism that lives in the depths of oceans.

They are one of about 300 species known to man and inhabit water from 1300 ft (396.2 m) below surface level. The average lifespan for these octopuses can range anywhere between two years up to 10 years, with females tending on living longer than males due to their reproductive system slowing down or ceasing altogether when they reach adulthood.

The seven-arm octopus has long been shrouded in mystery as it's seldom seen by humans but thanks to recent technology we now have live feed cameras capturing this amazing creature 24/7 underwater!

It has eyes at the ends of six arms, with one eye on top near its head that helps it see above water level.

The seventh arm acts as an antenna for finding prey beneath the ocean's surface. These critters are primarily carnivores who eat crabs and other small crustaceans but will also scavenge if necessary.

At night they hunt by taking advantage of their excellent vision which can allow them to spot shrimp from 100 meters away even though they don't have any eyeballs or lenses!

The seven-arm octopuses typically live alone but during spawning season males may mate with females before she lays her eggs on rocks.

Known for their camouflage, they can change colors and blend into their surroundings to avoid detection by predators such as sharks and dolphins. It has been found that when one arm spots danger it sends an electrical signal through two other arms which then causes all seven arms to release ink from glands near them.

Find more relatable content on the mimic octopus and a blue-ringed octopus!

Seven-Arm Octopus Interesting Facts

What type of animal is a seven-arm octopus?

The seven-arm octopus (Haliphron atlanticus) is a type of octopus with a gelatinous body and is found in marine zones.

What class of animal does a seven-arm octopus belong to?

The seven-arm octopus belongs to the class Cephalopoda that has seven arms and two tentacles. Due to these tentacles, the octopus is often thought to possess eight arms!

How many seven-arm octopuses are there in the world?

Scientists are unsure of the number. A seven-armed octopus is an animal that scientists know very little about, but what they do know is a bit creepy and confusing.

Where does a seven-arm octopus live?

A seven-arm octopus is a deep-sea creature that lives in the depths of our oceans. They are known to live up to nearly 16,500 ft (5029.2 m) below the surface and can stay underwater for about 10 hours, before returning back up through their home at night.

What is a seven-arm octopus's habitat?

A seven-arm octopus is rarely seen due to its ability to camouflage itself against the bottom of the ocean. Despite this, they are found throughout different areas in all oceans and seas across Earth's surface. They also inhabit a variety of habitats including coral reefs, tidal pools, and shallow waters with seaweed or kelp among other aquatic plants.

Who do seven-arm octopuses live with?

The seven-arm octopus species is a solitary creature, only seeking out or coming in contact with others of its kind during mating season. These creatures live at the bottom of the sea and eat mostly shrimp.

How long does a seven-arm octopus live?

The Pacific seven-arm octopi (Haliphron atlanticus) species are incredible creatures. They can live up to 20 years, where most other animals only have a lifespan of two or three years!

How do they reproduce?

Males stores their sperm in a sac called the hectocotylus. When he finds a female, he transfers it to her by inserting one of these arms into the part of her body that is used for catching prey and then depositing some spermatophores near or inside this opening as well.

The fascinating thing about this animal's reproduction cycle is how their eggs are able to survive during those many years away from any sort of nourishment whatsoever - not even light!

What makes them so hardy? That question still remains unanswered.

What is their conservation status?

The seven-arm octopus (Haliphron atlanticus) species has the conservation status of Least Concern.

Seven-Arm Octopus Fun Facts

What do seven-arm octopuses look like?

What is the most fascinating creature of the sea? The seven-arm octopus (Haliphron atlanticus)! They have a middle body and eight arms that radiate outward in different directions. Each arm has two rows of suckers, so they are really strong at catching prey with their tentacles coiled in a sac.

How cute are they?

You may think seven-arm octopus species look cute, but they are not! They're just plain creepy weighing around 160 lb (74.8 kg).

How do they communicate?

They communicate with each other by using their arms as if they were mouthparts and can use them in many ways – grabbing onto objects or even just reaching for food from another creature's tentacles!

How big is a seven-arm octopus?

A seven-arm octopus (Haliphron atlanticus) species was found off the coast of Costa Rica. Fully grown, this beast is 11 ft (3.35 m) in total length! This particular species had never before been seen in these waters and it's not even known if they are from North America or South America where their range can be very wide!

How fast can a seven-arm octopus swim?

A seven-arm octopus species can swim at speeds up to about 3 mph (4.8 kph).

How much does a seven-arm octopus weigh?

This giant octopus species has seven tentacles and weighs over 165 lb (74.8 kg). This is the equivalent of a large, grown man!

What are the male and female names of the species?

There are no sex-specific terms for this species, the seven-arm octopus. Both go by the name seven-arm octopus!

What would you call a baby seven-arm octopus?

The gelatinous babies of these species are simply known as seven-arm octopus babies!

What do they eat?

The seven-arm octopus is a notorious marine critter of the deep. It's not only known for its impressive eight-long tentacles that can span 16 ft (4.8 m), but it also has an appetite like no other. This master hunter will eat anything in sight ranging between shrimps, crabs, lobsters, and other small fish like guppies!

Are they poisonous?

The seven-arm octopus is not venomous. In spite of their appearance, these marine animals are completely benign and have no intention to hurt anybody or anything around them so it's best if you don't startle one!

Would they make a good pet?

Despite its common and scientific name, the seven-arm octopus actually has an eighth arm coiled in a sac. They are not good pets because they need huge spaces to live in.

Did you know...

Researchers have found evidence that octopuses can recognize individual humans, even when they are dressed in a full-body wet suit.

The largest octopus in the world is known as the giant Pacific octopus.

What is a septopod?

This is one of the most interesting marine creatures on earth, and it has seven stomachs. Did you know that septopods are able to survive in both salt water and fresh water? They're also known for their unique movement patterns!

Do octopuses have swim bladders?

There are a few schools of thought on the matter, but one thing is for sure: octopuses have chambers that serve as buoyancy devices in lieu of swim bladders - they use their lungs to control density levels instead!

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! For more relatable content, check out these coconut octopus facts and colossal squid facts for kids.

You can even occupy yourself at home by coloring in one of our free printable seven-arm octopus coloring pages.

*We've been unable to source an image of a seven-arm octopus and have used an image of a common octopus instead as the main image. If you are able to provide us with a royalty-free image of a seven-arm octopus, we would be happy to credit you. Please contact us at

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Written by Iram Ashfaq

Bachelor of Dental Surgery, Master of Public Health

Iram Ashfaq picture

Iram AshfaqBachelor of Dental Surgery, Master of Public Health

With a Bachelor's degree in Dental Surgery from Shaney Institute of Health Sciences and a Master's degree in Public Health from Imperial College London, Iram is a highly qualified and accomplished writer from Srinagar, India. Over the course of a year, she has acquired multiple writing certifications, focusing on health sciences and research studies. Prior to joining Kidadl, Iram gained valuable experience working as a content writer for Indian firms and interning at a New York-based company. Her expertise and passion for writing shine through in her ability to create compelling content across a variety of topics.

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Fact-checked by Sakshi Raturi

Postgraduate Diploma in Management

Sakshi Raturi picture

Sakshi RaturiPostgraduate Diploma in Management

Sakshi has experience in marketing strategy, social media planning, and recruiting industry experts for capstone projects, she has displayed a commitment to enhancing their skills and knowledge. She has won multiple awards, including a Certificate of Appreciation for Creative Writing and a Certificate of Merit for Immaculate Turut, and is always seeking new opportunities to grow and develop.

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