Viperfish – Size | Facts | Is the Viperfish Endangered?

(Last Updated On: April 12, 2021)

The source says, a viperfish is a species of marine fish of the genus Choliodas. Viperfishes are associated with long, needle-like teeth and a low-level jaw.

A typical Viperfish grows in length from 30 to 60 cm (12 to 23.5 inches). Viperfishes are near low depths during the day (2–3–3,4 feet [6–1,207 m]), and shallow depths at night are mainly in tropical and winter waters.

It is thought that Viperfish attacks the victim after refluxing with luminous light-producing organs, known as photophores, along the ventral side of its body, and with a prominent photophore at the distal end, reminds the memory of the ilicium with the dorsal fin.

Viperfish shines on and off this natural light, while at the same time turning its dorsal spine around like a fishing rod and hanging fully in the water. It uses light-producing organs to communicate with potential mates and rivals.


Viperfish varies from green to silver to black to color. A Viperfish uses his clever-like teeth to strangle a victim, and because of the length, he will not be able to close his mouth if it is not able to twist and turn his head back. The first vertebra behind the Viperfish’s head absorbs the shock of the bite. Like other dipsy fish, they are able to last very few meals.



Viperfish Lifespan

Viperfish are believed to survive 30 to 40 years in the wild, but they rarely live more than a few hours in captivity. Dolphins and sharks of some species are known to hunt Viperfish. Scientists believe that they can swim at speeds of two lengths per second but this is not yet a formal speed.

Although it is covered in fibers to see it, in reality, it is covered by a dense, transparent coating of unknown substances. Ultimately the large, sporty national teeth give the fish a slightly expanded lower jaw that makes hunting easier for the deep-sea predator. The Viperfish was lined with three different types of photophores, which some speculate might be tempting to suspect.

They have microscopic spheres without pigment layers scattered on the dorsal side, a pigment coat, large spheres with reflectors and lenses, and, finally, pigment coats, reflectors, and lenses that have large-scale bell-shaped organs lined up along the surface of the group. Photophores are seen along the ventral and lateral surface of the fish.

A viperfish in the deep water

A viperfish in the deep water


Since Viperfish are not accessible to humans in the bathoplastic environment, very little is known about their habits. The average temperature of these is found from 4,000 degrees Celsius to a depth of one thousand to 4,000 meters.

Viperfish are thought to be involved in daily vertical migration, since they have been observed overnight in the mesoplasmic region, directly above the bathoplasmic region. However, more direct observation is needed to confirm this hypothesis.


Viperfish does not have any specific type of prey. It is commonly found that they target everything they encounter in case they are hungry. With their dark complexion, they can disappear and remain unaltered for several hours, ready to attack the suspected victim.

The victim is caught and punched in the long teeth of the Viperfish because the victim is drawn to the Viperfish face; The subdued victim was then swallowed whole. Photophores along the stomach of the Viperfish are thought to help tempt the victim, although further observation is needed to confirm this hypothesis.

Viperfish - Deep Sea Creatures

Viperfish – Deep Sea Creatures


Viperfish is not among the common type of fish, rather, it is one of the very exceptional deep water fish. However, it is very common in nature and popular species. Scientifically known as Choliodas sloveni, it is one of the deepest predators.

This fish is easily identifiable by its large mouth and sharp, fang-like teeth. In fact, these fangs are so large that they do not fit inside the mouth. Instead, they are turning very close to the fish’s eyes.

Viperfish are thought to use these sharp teeth to enhance their prey by swimming at high speeds. The first vertebrae in the back of the head are designed to actually act as shock absorbers. The creature that produces this dreadful appearance has a long surface spine, which is given by the photophore, a light producing organ.

Viperfish uses this light organ to attract its prey through a process known as bioluminescence. By turning the light on and off, it can be used as a fishing greed to attract small fish.

Chauliodus macouni

Chauliodus macouni

Viperfish Prey

The unusually large teeth of Viperfish help keep the prey in the dark. Viperfish are seen relentlessly hanging in the water, spreading greed over their heads like fishing poles to attract their food.

They have a scalded skull, which can be swallowed by abnormally large prey. They also have large stomachs that allow them to feed food whenever it is in abundance.

Viperfish primarily feed on crustaceans and small fish. Like many deep-sea animals, they are known to move vertically throughout the day. During the daytime, they are usually found below 5,000 feet (1,500 meters) in deep water.

At night, they travel to shallow water at depths of less than 2000 feet (600 m) where food is plentiful. Viperfishes have very low basal metabolism rates, which means they can go hungry for a few days.

This adaptation is probably the result of the poor nature of deep seafood. Viperfish are known to be hunted by sharks and some species of dolphins.

A swimming viperfish

A swimming fish

Despite its deadly appearance, the Viperfish is a relatively small animal, growing to about 11 or 12 inches (30 cm) in length. It is usually dark blue in color but may vary from green to silver or black.

Although the main lobe is located at the end of a prolonged dorsal fin ray, there are also several photophores on the lateral side of the fish. These can help disguise fish from predators hiding underneath.

These lights filter their bottom side from the top to the perfect weak light to serve to attract the victim and interact with potential mates or rivals.


Due to the final depth they find, very little is known about the breeding habits of Viperfish. It is believed that these are external spans, which means that the wife lays eggs in the water to get fertilized. Spanning is likely to occur throughout the year, although the number of young larvae has been proven to be greatest between January and March.

These larvae spawn about six millimeters long (about a quarter of an inch). They are left to fend for themselves until they reach maturity.

Little is known about the life expectancy of Viperfish, but most researchers find that they live between 15 and 30 years. They rarely live more than a few hours in captivity.

Viperfish is found in tropical and temperate waters around the world at a depth of 9,000 feet (2,800 meters). They are rarely seen by humans, although samples are occasionally displayed in catches of deepwater trawlers.

These irregular catches provide a unique opportunity for scientists to study this unfathomable creature. Because they live in such deep water, it is believed that human activity has little effect on their population.

In which region do Viperfish live?

Viperfish is found in tropical and temperate waters around the world at a depth of 9,000 feet (2,800 meters). They are rarely seen by humans, although samples are occasionally displayed in catches of deepwater trawlers.

Viperfish (Chauliodus sloani) - deep sea specimen

Viperfish (Chauliodus sloani) – deep sea specimen

How long is the Pacific Ocean Viperfish?

The life span of this deep-sea fish varies from 15 to 30 years. They only survive for hours in captivity. Here are the most striking facts about the Pacific Viperfish: (1) Pacific Viperfish live up to a depth of up to 20 meters and are found in tropical and temperate waters.

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Is Viperfish Carnivorous?

A Viperfish is a species of marine fish of the genus Choliodas. Viperfishes are associated with long, needle-like teeth and a low-level jaw.

Is Viperfish Endangered?

It is a heterotroph, because it eats to save it, not because of the autotroph. It is neither on the endangered or threatened species list.

What does Viperfish eat?

Viper fishes are known to eat shrimp, squid, hermit crabs, anchovies, mackerel, and other small fish. They swim at high speeds toward the prey by pressing them with their sharp teeth. Other animals that eat this fish include dragonfish, dolphins, and sharks. They live mainly in tropical to equatorial waters.

Chauliodus sloani

Chauliodus sloani


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