Vampire squid facts for kids
Quick facts for kids Vampire squid |
|
|---|---|
 |
|
Scientific classification  |
|
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Vampyromorphida |
| Family: | Vampyroteuthidae |
| Genus: | Vampyroteuthis Chun, 1903 |
| Species: |
V. infernalis
|
| Binomial name | |
| Vampyroteuthis infernalis Chun, 1903
|
|
| Script error: The function "autoWithCaption" does not exist. | |
| Synonyms | |
|
|
Script error: No such module "Check for conflicting parameters".
The vampire squid (Vampyroteuthis infernalis) is a fascinating creature of the deep sea. Its name means 'vampire squid from hell'. This small cephalopod lives in the very deep, dark parts of temperate and tropical oceans. It has special ways to survive where there is very little oxygen.
The vampire squid uses its amazing light-producing organs, called bioluminescent organs, to live in these extreme conditions. It also has a unique way of using oxygen. It has two long, hidden filaments between its arms. These filaments help tell it apart from both octopuses and squids. Even though it looks like a mix, its closest relatives are octopuses. It is the only living member of its special group, called Vampyromorphida.
Contents
What's in a Name?
The name Vampyroteuthis comes from the Latin word vampyrus, meaning vampire. The Greek word teuthís means "squid." The species name "infernalis" means "of hell" in Latin.
People thought of the name because of its dark color and the web of skin that looks like a cloak. But don't worry, it doesn't drink blood! It actually eats tiny bits of dead stuff floating in the ocean, called marine snow.
How the Vampire Squid Was Discovered
The first vampire squids were found during an ocean trip called the Valdivia Expedition. This trip happened from 1898 to 1899. A German zoologist named Carl Chun led the expedition. He wanted to prove that life could exist very deep in the ocean, even below 550 meters (about 1,800 feet).
Many scientists at the time believed that nothing could live that deep. The Valdivia ship was specially equipped to collect deep-sea animals. It had laboratories and jars to study and keep the creatures they found. The expedition traveled around Africa and explored the Indian and Antarctic Oceans. Carl Chun later placed the vampire squid into its own family, Vampyroteuthidae.
In 2024, some scientists suggested there might be a second species of Vampyroteuthis. However, in 2026, other scientists looked at the evidence again. They found no clear differences in how the animals looked or in their DNA. So, it was decided that the proposed second species was actually the same as V. infernalis.
What Does a Vampire Squid Look Like?
The vampire squid can grow to about 30 centimeters (1 foot) long. Its body is soft and jelly-like, about 15 centimeters (6 inches) long. Its color can be velvety black or pale reddish. This depends on where it lives and how the light hits it.
A web of skin connects its eight arms. Each arm has rows of soft, fleshy spines called cirri. The inside of this "cloak" is black. Only the outer parts of its arms have suckers.
Its large, round eyes are amazing. They can look red or blue, depending on the light. These eyes are the biggest in the entire animal kingdom compared to the animal's body size! A squid that is 15 centimeters long can have eyes that are 2.5 centimeters (1 inch) across. Its brain also has large parts for processing what its big eyes see.
Adult vampire squids have two small, ear-like fins on their sides. These fins are how adults mostly move through the water. They flap their fins to swim. Their mouth has white, beak-like jaws. Inside the webbing of their arms are two hidden pouches. These pouches hold the long, touch-sensitive filaments. These filaments are like the tentacles of a true squid, but they have a different origin.
The vampire squid is almost completely covered in light-producing organs called photophores. These organs can create bright flashes of light. These flashes can last from a tiny fraction of a second to several minutes. The squid can also change how bright and big these lights are. The photophores look like small, white discs. They are bigger and more complex at the tips of the arms and near the fins. But they are not found on the underside of the webbed arms. Two larger white areas on its head were once thought to be photophores. Now we know they are photoreceptors, which help it sense light.
Most cephalopods can change their skin color using special pigment organs called chromatophores. But the vampire squid's chromatophores are not very developed. It cannot change its skin color dramatically. This ability wouldn't be useful in the pitch-black depths where it lives.
Its Place in the Ocean Family Tree
The vampire squid belongs to a group called Vampyromorphida. This group is the closest living relative to all octopuses. Scientists have studied their genes and found that the Vampyromorphida were the first group of Octopodiformes to evolve. They have unique features like their light-producing organs and those two special filaments. Like squids, they have an internal stiffening structure called a gladius. Like some octopuses, they have eight webbed arms with spines.
The vampire squid's eight arms with spines are similar to those of cirrate octopuses. However, the vampire squid only has suckers on the outer half of its arms, while the spines run the whole length. In cirrate octopuses, both suckers and spines run the entire length of the arms. Fossils, like Vampyronassa rhodanica from the middle Jurassic period, show some similarities to the vampire squid. This helps scientists understand its ancient relatives.
Life in the Deep Sea
The vampire squid lives in the tropics and subtropics around the world. It is a true deep-sea creature. It lives in the lightless depths, usually from 600 to 900 meters (about 2,000 to 3,000 feet) or even deeper. In these parts of the ocean, there is a special area called the oxygen minimum zone (OMZ). Here, the amount of oxygen is too low for most animals to survive.
The vampire squid is the only cephalopod that can live its entire life in this oxygen minimum zone. It can survive with oxygen levels as low as 3%. Scientists have learned about its behavior from brief sightings by remotely operated underwater vehicles (ROVs). Vampire squids can live for up to two months in aquariums. Some scientists think they might live for more than eight years.
To handle life in the deep, suffocating depths, vampire squids have developed special features:
- They have the lowest metabolic rate (how fast their body uses energy) of all deep-sea cephalopods.
- Their blood is blue and contains hemocyanin. This substance helps them carry oxygen much better than other cephalopods.
- Their gills have a very large surface area to take in more oxygen.
- They have weak muscles and a small internal shell.
- They stay agile and float easily because of special balancing organs (like our inner ear) and jelly-like tissues rich in ammonium. These tissues are about the same density as the surrounding seawater.
- Living in the OMZ also protects them from large predators that need a lot of oxygen to survive.
The vampire squid's huge eyes and large brain parts for vision might help it see faint bioluminescence from far away. This could be signs of food or other vampire squids. This sensitivity is very useful in the vast, dark ocean.
Sometimes, a tiny protist parasite can be found on the gills of vampire squids.
Staying Safe from Predators
Unlike many shallow-water cephalopods, the vampire squid does not have ink sacs. Because of this and its slow metabolism, it has developed other ways to defend itself.
If it feels threatened, it will curl its arms outwards and wrap them around its body. This makes it look like it's turning itself inside-out. This posture makes it appear larger and shows off the spiny projections (cirri) on its tentacles. The underside of its webbed cape is very dark. This hides most of its light-producing organs. The glowing arm tips are grouped together far above its head. This helps to draw an attack away from its important body parts. This defense is called the "pumpkin" or "pineapple" posture. If a predator bites off an arm tip, it can grow back. This allows the squid to escape while the predator is distracted.
If it is very scared, it can shoot out a sticky cloud of glowing mucus from its arm tips. This mucus contains countless tiny blue lights. This bright display can last for almost 10 minutes. It probably helps to blind predators, allowing the vampire squid to disappear into the darkness without swimming far. This glowing "ink" can also stick to the predator. This creates a "burglar alarm effect." It makes the predator more visible to other predators, like the light display of the Atolla jellyfish. The squid only uses this glowing mucus when it's very agitated. This is because it takes a lot of energy to make more mucus.
The vampire squid's glowing "fireworks" combined with its wriggling, glowing arms and sudden movements make it hard for a predator to target it. Its retractable filaments might also help it detect and escape from danger.
Despite these defenses, vampire squids have been found in the stomachs of large deep water fish, like giant grenadiers. They have also been found in deep-diving mammals, such as whales and sea lions.
What Does a Vampire Squid Eat?
Vampire squids have eight arms but no feeding tentacles. Instead, they use their two retractable filaments to catch food. These filaments have tiny hairs with many sensory cells. These cells help them find and grab their prey. They mix waste with mucus from their suckers to form balls of food.
They are slow-moving, generalist feeders. They eat marine snow, which includes dead bits of jelly-like zooplankton (like salps and jellies). They also eat small crustaceans like copepods and amphipods. They even eat the waste pellets from other ocean animals that live above them. Vampire squids also have a unique way to attract food. They purposefully stir up bioluminescent protists in the water. This light display can attract larger prey for them to eat.
Older vampire squids are also thought to be opportunistic hunters. This means they will eat whatever food they can find. Fish bones and scales have been found in the stomachs of mature vampire squids.
The Vampire Squid Life Cycle
Scientists believe that vampire squids reproduce slowly. They lay a small number of large eggs. This is a strategy often seen in animals that live a long time and have a good chance of surviving as adults. They don't put much energy into developing their reproductive organs.
They grow slowly because there isn't much food in the deep waters where they live. Their habitat is huge, and there aren't many of them. So, finding a mate is a lucky event.
Reproduction for the vampire squid is special. The male passes a "packet" of sperm to the female. The female stores this sperm packet in a special pouch inside her body. She can keep the sperm for a long time before she is ready to fertilize her eggs. Once she does, she might brood over her eggs for up to 400 days before they hatch!
Unlike most other cephalopods, which reproduce only once and then die, vampire squids can reproduce multiple times. After laying one batch of eggs, new eggs form after the female rests. This process can happen up to, and sometimes more than, twenty times in their life. These egg-laying events happen far apart because of the vampire squid's slow metabolism.
We don't know many details about how young vampire squids develop. Hatchlings are about 8 millimeters (0.3 inches) long. They look like tiny versions of the adults, but with some differences. They are transparent, their arms don't have webbing, their eyes are smaller, and their filaments are not fully formed.
They go through three stages of development. Very young animals have one pair of fins. An intermediate stage has two pairs of fins. Then, the mature form again has one pair of fins. As the animal grows, the first pair of fins near the eyes disappears. A new pair develops as they get older. Young vampire squids mostly move by jet propulsion. But adults prefer to flap their fins, which is more efficient. This unique development caused confusion in the past. Scientists sometimes thought the different forms were different species!
The hatchlings survive on a good supply of internal yolk for some time before they start to actively feed. The younger animals live in even deeper waters. They feed on marine snow and tiny zooplankton.
Vampire Squids and Humans
The vampire squid is not currently on any endangered or threatened species list. They don't have any known direct impact on humans. However, vampire squids are at a higher risk from micro plastic pollution. This is because their diet mostly consists of marine snow, which can contain tiny plastic particles.
See also
In Spanish: Calamar vampiro para niños
