The different species found in the various layers of the sea

The different species found in the various layers of the sea

Up to this day, there is only 5% of the entire ocean explored and the remaining percentage is still undiscovered. Despite that fact, scientists and professionals still consider this as a breakthrough because this progress already shows a lot of information about the large body of water. 

From these numerous ocean explorations, oceanographers have shown the public that the ocean is divided into five different zones: the Epipelagic, Mesopelagic, Bathypelagic, Abyssopelagic and Hadopelagic zones. Each one contains varying fish species that can withstand the living conditions of a certain zone. Continue reading this article to find out more about it.

Epipelagic zone

The Epipelagic zone is the first layer of the sea that receives most of the light and warmth of the sun. As such, it is also known as the sunlight zone. Here is the list of fish species that thrive in this area:


Salmon is one of the fishes found in this area, and you would see their elongated bodies swimming against the current. They feed on small fishes, krill and crustaceans, and they also travel in schools.


A huge and elongated streamlined fish known as the tuna swims through the current. This fish species is related to mackerels, which explains their varying sizes. Moreover, tuna has fins that help propel them in the waters, and they are considered one of the fastest swimmers in the ocean.


The clownfish is a fish species that everybody is familiar with because it is the main character from the popular Disney film, Finding Nemo. Moreover, it is easy to spot in the ocean because of its bright orange, white and black colours alternating across its body. Aside from that, you would often find them living inside sea anemones. 


While the Epipelagic zone is full of life, predators still roam the area and watch their prey quietly before making an attack. One of them is the great barracuda, with its elongated form and grey scales as the highlights of its body. Moreover, this fish has a set of sharp teeth that can instantly pierce through its prey. 

Great white shark

The most revered predator found in the Epipelagic zone is none other than the great white shark. Its massive body and overtly reputation for being a hungry creature pose a big threat to its prey. This fish species would show no mercy to whatever it comes across and it would always prove its high status by making a kill. 


Another common thing about the Epipelagic zone is that you would often see flatfish travel in schools. The most common species is the anchovy, and you will always see them together.

Mesopelagic zone

A low glow from the sun shows a faint illumination in the mesopelagic and twilight zone. Here, there is not enough light to support photosynthesis for plants and microorganisms. Additionally, the creatures in this area have counter-illuminators that let them blend with the ambient light and avoid predators. Here are the fish species thriving in the Mesopelagic zone:


A large but flatfish roams around the Mesopelagic zone, and it is none other than the sunfish. This is one of the two heaviest known bony fish in the sea which makes its size a threat to other species. 

Atolla jellyfish

The Atolla or crown jellyfish is one of the popular creatures in this area due to its striking bright red colour. Sitting at the top of its head is a colour blue dome that resembles a crown, hence the name. Aside from that, it has long tentacles that will easily attach to any organism in the zone.

Angler fish

A small bulb of light floats within the area of the Mesopelagic zone. You may think that it is harmless, but do not be fooled because this is the special luring feature of the angler fish. This fish species is one of the bioluminescent animals and their glow emanates from the ambient light of the area. Aside from that, its body runs small at the back but grows big as you go to the front. Additionally, it has a large jaw that houses tall pointed teeth.

Bathypelagic zone

As you go deeper into the ocean, you will be embraced by the darkness and cold temperature of the Bathypelagic zone. Creatures in this area move slowly due to the sluggish current, and their bodies can embrace the freezing climate of 4 degrees celsius. Here are some of the fish species found in this area:


The oarfish holds the title of being the longest fish in the sea. Its body is bespeckled with blue spots, and it has red fins running throughout the length. Aside from that, this fish has large eyes and a small mouth. As for its mobility, oarfishes do not swim horizontally, but instead, they float vertically in the water.


As you dive deep into the darkness, you would find the fabled chimaera or ghost shark. It has bird wings as its fins, a large pointed head and dead eyes that can see through your soul. On its jaws, the chimaera possesses over 3 pairs of grinding teeth that can help them break down the food they eat. Additionally, this fish species can go as short as 60 centimetres and can grow as big as 200 centimetres.


A beautiful and colourful fish spreads its multicoloured wings as it swims through the deep dark ocean. Its fins resemble the talons of a dragon, as well as its main body and pointed head. Moreover, these fishes are about 6 inches long, and their bodies are protected with rings of armour. 

Abyssopelagic zone

There is a deeper and darker zone that exists, and it is called the Abyssopelagic zone. The temperature here is near freezing, and it has an extreme water pressure that only a few creatures can withstand. Here is a list of what roams in the Abyssopelagic:


From its name, this fish has a large mouth and uses it to filter feed throughout the abyss. It can eat small microorganisms to large fishes, but it only hunts its prey during the night when the waters are still. Other than that, megamouths have colourless but large bodies, and they exhibit what you call deep sea gigantism, which is an adaptation for survival.

Faceless fish

The faceless fish belongs to the cusk eel family, and its head is covered with a thick layer of skin that hides the usual face of a fish. Despite this fact, it still has a pair of eyes found underneath the layer of skin. As for its mouth, it is located at the underside of its head, which makes it easier for it to feed. 

Tripod fish

Another interesting creature that thrives in the abyss of the sea is the tripod fish. It has an elongated pelvic and uses its lower caudal-fin rays as a tripod. As such, it stands tall at the bottom of the ocean and lays motionless until it senses a potential prey passing through. When that happens, the tripod fish will use its dorsal fins to capture their food for the day. Additionally, its face blends well in the background due to its elongation and colourless features.

Hadalpelagic zone

The Hadalpelagic zone is the deepest part of the ocean yet, and it is where the trenches are found. In this area, there is almost little to no life because of its harmful environment. Strong and immense water pressures can guarantee instant death, and the temperature can easily petrify you. Additionally, the darkness adds a mysterious effect to the creatures that lurk in the hadalpelagic:


The Grenadier is one of the creatures that thrive in the Hadalpelagic zone. It has a large pointed head, but its body thins out like a tail as you reach the end. Moreover, its head is used for rooting food that can be found at the bottom of the ocean.

Hadal snailfish

The snailfish species has evolved to a point where it can survive in the Hadalpelagic zone. Despite the harsh setting conditions, the hadal snailfish has a cute and tiny body that crawls along the ocean floor. Aside from that, it has a white colour and a pair of fins that resemble angel wings.

So far, these two fish species have been discovered in the Hadalpelagic zone, and there is still more to learn about the lifestyles of these creatures. 

The sea is a wonderful entity on Earth, but it is also mysterious because of the secrets it holds. Learn more about fish by visiting the website of Fun Fishing where you can find informative and entertaining blogs you will like.

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