Grimpoteuthis discoveryi facts for kids
Quick facts for kids Grimpoteuthis discoveryi |
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| Specimen collected in 2009 | |
| Conservation status | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Octopoda |
| Family: | Grimpoteuthidae |
| Genus: | Grimpoteuthis |
| Species: |
G. discoveryi
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| Binomial name | |
| Grimpoteuthis discoveryi Collins, 2003
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The Dumbo Octopus is a special type of octopus that lives deep in the ocean. Its scientific name is Grimpoteuthis, and it gets its nickname "Dumbo" because it has two large, ear-like fins that stick out from its head, just like the famous elephant from the Disney movie! These fins help it swim gracefully through the water.
Contents
What Do They Look Like?
Dumbo Octopuses have soft, gelatinous (jelly-like) bodies. This helps them survive the immense pressure of the deep sea. Unlike many other octopuses that use "jet propulsion" (squirting water to move), Dumbo Octopuses mostly use their special fins to swim. This fin-powered movement helps them save energy in their cold, dark home. They also have eight arms, like other octopuses, connected by a web-like skin. Along their arms, they have tiny, finger-like projections called cirri, which are very useful for finding food.
How Long Do They Live?
From what scientists have observed, Dumbo Octopuses typically live for about 3 to 5 years. This might seem short to us, but for a creature living in such extreme conditions, it's a good amount of time to grow, find food, and have babies.
Where Do Dumbo Octopuses Live?
Dumbo Octopuses are true deep-sea adventurers! They are believed to live all over the world, in the very cold, very deep parts of the ocean, from about 1,000 meters (that's over 3,000 feet, or about 10 football fields stacked up!) all the way down to 7,000 meters (about 23,000 feet, or more than 200 football fields!).
Scientists have found Dumbo Octopuses in many different places, including off the coasts of Oregon, the Philippines, New Zealand, Australia, California, and even in the Gulf of Mexico.
Here are some of the most recent observations:
- June 21, 2022: A Dumbo Octopus was spotted at 1,250 meters deep off the coast of Norway by a vessel called the Normand Ocean, which uses underwater drones to inspect drilling platforms.
- May 24, 2023: Another sighting occurred at 2,108 meters deep in Guyana, observed by the vessel Far Samson, also using underwater drones.
- March 5, 2025: The most recent known recorded observation was made by the vessel "Boka Falcon" with a special underwater robot called a Workclass Remotely Operated Vehicle (ROV). This Dumbo Octopus was seen at a depth of 960 meters in the Gulf of Guinea, near Ivory Coast. Two separate sightings happened about 20 minutes apart!
Behavior
When scientists observe Dumbo Octopuses in the Atlantic Ocean, they often see them resting on the seafloor. They spread out their arms and the web between them, sometimes slowly crawling along the bottom. When something disturbs them, they quickly pull in their web and arms, using their mantle fins (the "ears") to push themselves off the seafloor and swim away quickly. Their fins have special cushiony cartilage that helps support the strong muscles needed for this fast movement.
What's for Dinner?
Dumbo Octopuses are carnivores, which means they eat other animals. Their diet includes small crustaceans (like tiny crabs or shrimp), bivalves (like clams), worms, and copepods (which are tiny, shrimp-like creatures). Since it's hard to watch them eat in the deep ocean, scientists learn about their diet by looking at what's inside their stomachs.
It's thought that Dumbo Octopuses catch their food by spreading out their webbed arms. They might trap small prey inside the web or between their web and the seafloor. Then, they use those finger-like cirri on their arms to move the food towards their mouth.
Life Cycle
Dumbo Octopuses are what scientists call "continuous spawners." This means that female Dumbo Octopuses carry many eggs inside them at different stages of development. Instead of laying all their eggs at once, they lay just one or two eggs at a time, whenever they are ready. There isn't a specific season for them to lay eggs; they can do it any time of the year.
Mating in Dumbo Octopuses has never actually been seen by humans, which makes it a bit of a mystery! Unlike many other octopuses, male Dumbo Octopuses don't have a special arm called a hectocotylus to transfer sperm. Instead, the male uses its large suckers to pass special packets of sperm, each protected by a cover, directly into the female's mantle cavity (a space inside her body). The female then stores this sperm and uses it to fertilize her eggs when she is ready to lay them.
Dumbo Octopus eggs are quite unique! They are large and have a tough, protective casing around them. This casing hardens even more when it touches the cold deep-sea water, making the eggs very strong and safe. Female Dumbo Octopuses attach their eggs to deep-sea corals, which are often called octocorals. These corals provide a safe place for the eggs to develop.
One of the most amazing things about the Dumbo Octopus life cycle is what happens after the eggs are laid. Unlike many other octopus mothers who guard and care for their eggs, the female Dumbo Octopus does not stay with her eggs. When the eggs hatch, the baby Dumbo Octopuses emerge as "fully competent" juveniles. This means they are born with all the senses and abilities they need to survive on their own right away! They don't need their parents to teach them how to find food or swim; they are ready for their deep-sea adventure from day one.
Lifespan
Dumbo Octopuses are known to live for about 3 to 5 years in the deep, cold parts of the ocean.
Threats
Because Dumbo Octopuses live so incredibly deep in the ocean, usually below 1,000 meters, they don't face many direct threats from humans. We don't often go that deep, and fishing nets usually don't reach them.
Natural Predators
In their natural habitat, Dumbo Octopuses do have some predators. Large fish, sharks, and even marine mammals like sperm whales and seals might try to eat them. However, Dumbo Octopuses have only rarely been found in the stomach contents of a shark, suggesting they are quite good at avoiding danger.
Interesting Facts about Dumbo Octopuses
- There are 17 different kinds, or species, of Dumbo Octopuses that scientists know about.
- They are the deepest-living octopuses known to science.
- Unlike many other octopuses you might know, Dumbo Octopuses (and all cirrate octopuses) do not have an ink sac. This means they can't squirt ink to escape from predators.
- They also can't change their color to blend in with their surroundings, which is something many shallow-water octopuses are famous for. How they manage to escape or avoid predators without these abilities is still a bit of a mystery to scientists!
- It can be a bit tricky to tell the difference between male and female Dumbo Octopuses. In some species, the males might have slightly larger suckers on their arms compared to the females, but this isn't true for all Dumbo Octopus species.
