Fun Deep-sea Fish Facts For Kids | Kidadl


Fun Deep-sea Fish Facts For Kids

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Deep-sea fish are the species of the extreme depth of the ocean. They are the life in the world existing in the ocean depths. Considered to be highly predatory by nature, they are spotted through the Indo-Pacific range through the coastal areas of countries like South Africa, Japan, and Brazil. In South Africa, the fish are restricted to the east and along the Ascension Islands towards the south. A few fish can be spotted near the Indo-Pacific region moving towards Mauritius and New Guinea. New Zealand and Australia have recorded a few groups of these species as well. In Japan, towards the north of Fiji, the species were spotted traveling towards the eastern area near the Guadalupe Islands. Fish like the anglerfish and viperfish are most comfortable in the bathyal zone. The bathyal zone is created at a depth between 0.62-2.48 mi (1000-4000 m) with an average temperature of 4 ℃ (39.2 ℉). Read on to know more about these deep-sea organisms.

 If you like reading this, you might want to read about black ghost knifefish and royal gramma.

Fun Deep-sea Fish Facts For Kids

What do they prey on?

Crustaceans, squid and smaller fishes

What do they eat?


Average litter size?


How much do they weigh?

Flashlight fish- N/A Viperfish- 0.03 lb (13 g) Bristlemouth- N/A Anglerfish- 100 lb (45.3 kg)

How long are they?

Flashlight fish - 5.5 in (14cm) Viperfish- 12-23.5 in (30.48-60 cm) Bristlemouth- 0.8-11.8 in (2-30 cm) Anglerfish- N/A

How tall are they?


What do they look like?

Red, gray, brown and white

Skin Type


What were their main threats?

Humans And Predators

What is their conservation status?

Least Concern

Where you'll find them?

Subtropical And Temperate Regions


South Africa, Brazil, The Atlantic Ocean, Indo-pacific Region




Flashlight fish - Photoblepharon Viperfish- Chauliodus Bristlemouth- Gonostoma Anglerfish- Melanocetus




Flashlight fish - Anomalopidae Viperfish- Stomiidae Bristlemouth- Gonostomatidae Anglerfish-N/A

Deep-Sea Fish Interesting Facts

What type of animal is a deep-sea fish?

A deep-sea fish is a fish.

What class of animal does a deep-sea fish belong to?

These natural deep-sea fishes usually belong to the Actinopterygii class of animals.

How many deep-sea fish are there in the world?

These marine creatures of the dark are listed under the Least Concern category by the International Union for Conservation of Nature (IUCN). Although this deep-sea fish list is Least Concern at the moment, the exact number of individuals currently residing on the planet is not known as of now.

Where does a deep-sea fish live?

The species of deep water are typically found in the depths of the major ocean bodies. The deep water areas include the bottom and the surface of the Indian ocean along with the Atlantic and the Pacific Ocean. They can also be spotted in the water bodies of the countries like Brazil, South Africa, and the Bahamas.

What is a deep-sea fish's habitat?

The long deep-sea fish habitat includes the dark and the rare habitat surface of the ocean water. They are mostly found in temperate water zones. The fish are known to have a stable life in the great depths ranging from around 0.62-2.48 mi (1000-4000 m) on average.

Who do deep-sea fish live with?

They are mostly spotted in groups and sometimes in isolation.

How long does a deep-sea fish live?

The exact lifespan of these creatures is not known.

How do they reproduce?

Very little has been known regarding the reproduction process of these species. They are found to be engaged in vertical spawning during reproduction. The females have mostly carry the embryo within them till the time of birth. Around 6-12 pups are born in a single breeding season in some species while others lay innumerable eggs.

What is their conservation status?

According to the International Union for Conservation of Nature (IUCN), these species are listed under the Least Concern category. A decreasing trend has been recorded in their population due to overfishing or falling as prey to bigger predators.

Deep-Sea Fish Fun Facts 

What do deep-sea fish look like?

Most of these species have identical looks. The flashlight is a deep-sea fish with light. It has light-emitting organs right beneath its eyes and a triangular body. Cookie-cutter sharks could be elongated with red scales on them and a small snout at the onset of the head. A prominent part of deep-sea fish identification is the mouth. Generally, the mouth of the fish is larger than the head and the mouth consists of sharp teeth along with strong suction power.

The deep-sea fishes are nocturnal in nature.

How cute are they?

Needless to say, these creatures are far from being termed cute. Being aggressive in nature, they do possess a terrifying look on their face.

How do they communicate?

Since these species are members of the extreme depth of the ocean, not much has been recorded regarding their behavioral and communication processes.

How big is a deep-sea fish?

On average these creatures could weigh between 0.03- 100 lb (13-45359.2 g). They are pretty small and are almost 300 times smaller than a normal shark which has an average weight of around 1146.4-2425 lb (520–1,100 kg).

How fast can a deep-sea fish swim?

They have the fast natural speed to chase and hunt their prey. Although the exact speed of the species is not recorded, they could be extremely swift and rapid when it comes to hunting.

How much does a deep-sea fish weigh?

These underwater species have an average weight of around 0.03- 100 lb (13-45359.2 g).

What are the male and female names of the species?

There is no specific name assigned to the male and the female members of the species. They are usually referred to by the sex that the individuals belong to.

What would you call a baby deep sea fish?

A baby fish is usually referred to as a pup or larvae.

What do they eat?

There could be a large number of items for the fish to eat. Considering the fact that these species are carnivores by nature, they mostly feed on crustaceans and smaller fishes. The prey includes dolphins, sperm whales, and goblin sharks. On rare occasions, they attract organisms of their own size to attack them.

Are they aggressive?

These species are known to be aggressive attackers. They have an extremely sharp set of teeth inside their mouths which helps them to easily hunt down their prey. Hence, they are extremely aggressive in nature and history states that they have hunted varied prey. They lure them towards them for their food. Some of them have been known to attack humans as well.

Would they make a good pet?

No, these species would definitely not make a good pet to humans. Since they are known to attack humans as well when interacted with, it would be advisable to avoid considering these creatures of the wild as a pet.

Did you know...

The largest deep-sea fish is the whale shark with an average length of around 59 ft (18 m).

The deepwater creatures cannot be considered edible deep-sea fish as they contain a large number of bacteria on their scales. These bacteria make the species way more toxic and harmful than those of the shallow water. The lanternfish is the most common deepsea creature.

Different types of deep-sea fish

According to the history of the ocean world, there are many deep water species that have been discovered in their natural environment. Although only a few deep-sea fish names and pictures have been recorded as of now, the most common species of the dark water world would be the anglerfish, viperfish, flashlight fish, as well sharks like the cookie-cutter shark.

Are deep-sea fish dangerous?

These species are extremely dangerous and have the potential to instantly kill their prey. They possess a set of sharp teeth and a single bite from their mouths can divide the prey in half.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! Learn more about some other fish from our Mandarinfish facts and scissortail rasbora facts pages.

You can even occupy yourself at home by coloring in one of our free printable anglerfish coloring pages.

Written By
Moumita Dutta

<p>A content writer and editor with a passion for sports, Moumita has honed her skills in producing compelling match reports and stories about sporting heroes. She holds a degree in Journalism and Mass Communication from the Indian Institute of Social Welfare and Business Management, Calcutta University, alongside a postgraduate diploma in Sports Management.</p>

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