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Top 10 Cutest Fish in the World


The marine world is an extraordinary place with an impressive variety of species. Every fish is uniquely designed with different physical features and mental abilities. However, the smallest and cutest fish have the ability to capture our attention. 

These charming creatures are a creation of nature and it’s not surprising to see them in aquariums captivated by humans. As fascinating as it is to see the majestic creatures of the deep blue sea, it’s equally interesting to explore the small beautiful fish. The cutest fish come in an array of colours, patterns, and textures, making them one of the most artful creations of nature.

In this article, you will be enlightened about the ten cutest fish found in various aquatic habitats across the globe. To delve deeper into these charming creatures, please proceed with reading further.

Top 10 Cutest Fish Around The Globe

The world is home to an incredibly diverse range of cutest fish species, each with its own distinct physical and mental traits. While beauty is in the eye of the beholder, there are a few species that everyone can agree are simply adorable. From the vividly coloured mandarin fish to the playful clownfish, these cutest fish are a joy to behold. 

Despite their diminutive size, these fish pack a big personality punch, each with their own unique quirks and behaviours. Whether you’re an avid aquarium enthusiast or a passionate marine biologist, these top 10 cutest fish are sure to put a smile on your face and warm your heart.

#1 Clown Fish 

Cutest Fish

The clownfish, also known as anemone fish, is renowned for its stunning colouration in shades of white and orange. This fish rose to fame in 2003 with the release of the movie “Finding Nemo,” featuring a clownfish named Nemo as the main character.


Clownfish can reach a maximum length of nine centimetres. The females tend to be larger than the males, with some females reaching a full length of nine centimetres. Male clownfish possess both male and female reproductive organs, and the breeding males are the second-largest individuals in the species, following the females.

Region of Origin:

These cutest fish are predominantly found in the warm waters of the Pacific Ocean and the Red Sea. They typically inhabit sheltered areas, often seeking refuge among anemones, which are marine plants that display beautiful white-coloured flowers.

Aquarium Requirements:

Clownfish can be kept in an aquarium with a minimum capacity of thirty gallons of water. They require ample hiding spaces to feel secure in their environment. As omnivores, they have a varied diet, consuming both animal-based and plant-based food sources, including algae.

#2 Sea Horse

Sea horses are an essential addition to any list of the top cutest fish. While many people may not realize it, sea horses are actually a type of cutest fish. These tiny creatures are truly magnificent creations of nature, exhibiting a range of colours including pink, yellow, grey, and orange.


Sea horses can vary in length, ranging from as small as two centimetres to as long as thirty-five centimetres. One notable feature that distinguishes males from females is the presence of a belly pouch in the males. It is within this pouch that the male fertilizes the eggs. In an intriguing reversal of roles, sea horse males are the ones who give birth.

Region of Origin:

These fascinating creatures are predominantly found in tropical areas with shallow, salty waters. They prefer to inhabit sheltered areas where they can find ample hiding spots and form their habitats. Various species of sea horses can be found in Pacific waters spanning from North to South America.

Aquarium Requirements:

To accommodate sea horses in an aquarium, they should have a water capacity of around forty to fifty gallons, with a minimum height of eighteen inches. Since sea horses have a unique mode of movement, frequently going up and down instead of sideways, they require vertical space within the tank. They are omnivores and can thrive on both plant-based and animal-based food sources.

#3 Bluefin Notho

The Nothobranchius Rachovii, also known as Bluefin Notho, originates from Mozambique. This fish possesses a remarkable and awe-inspiring physical appearance. With a red base colour adorned with vibrant flashes of electric blue and turquoise, it unquestionably deserves a spot on the list of cutest fish.


These cutest fish can reach a length of up to 6cm. The males of this species are larger and more visually appealing than the females. They have a relatively short lifespan of about a year, emphasizing the importance of breeding. Maturity for breeding is achieved within a few weeks after birth.

Region of Origin:

The Bluefin Notho primarily inhabits the lowlands bordering rivers. During the hot seasons, the water levels in these areas tend to decrease. Local communities often utilize these lands for rice cultivation, resulting in a period known as the “kill fish season” when Bluefin Notho and other fish species in the lowlands face challenges.

Aquarium Requirements:

Bluefin Notho can be housed in an aquarium with a temperature ranging from twenty to twenty-four degrees Celsius, along with moderate lighting. They thrive in slightly acidic water conditions. Their diet consists of dried vegetables, with the females exhibiting a greater appetite as they produce eggs on a daily basis.

 #4 Mandarinfish

Belonging to the Dragonet family, these fish are truly magnificent creations of nature, standing out with the captivating colour patterns that distinguish them from other sea creatures.

With an electric blue body adorned with striking orange and green markings, their blend of colours is mesmerizingly eye-catching.


Mandarinfish can reach a length of up to eight centimetres. The males are larger than the females and feature a vibrant pattern of green and orange colour combination. These fish have a lifespan of up to fifteen years.

Region of Origin:

They are primarily found in the western Pacific Ocean region. Mandarinfish prefer dwelling in the depths of the ocean, often swimming near the ocean floor.

Aquarium Requirements:

Mandarinfish have a carnivorous diet, which can make them challenging to keep in an aquarium due to their specific nutritional needs. However, once you overcome the obstacle of providing them with their specialized diet, they are relatively easy to maintain alongside other non-aggressive fish species. The aquarium temperature should range from twenty-four to twenty-seven degrees Celsius, and the tank should have a capacity of at least twenty-nine gallons of water or more.

#5 Blue Tang 

This fish exhibits a vibrant blue colour as its base, adorned with striking yellow and black patterns. In 2003, the character “Dory” in the film “Finding Nemo” brought significant popularity to the blue tang fish.


Blue tangs can grow to lengths ranging from 25 to 31 centimetres. Male blue tangs are considered mature when they reach a length of 13 centimetres, while females achieve maturity at around 11 centimetres. If kept in their natural habitat, their lifespan can extend up to 30 years.

Region of Origin:

These fish are primarily found in the western Atlantic Ocean and the surrounding regions. They are particularly prevalent in areas such as Florida, the Bahamas, and the Caribbean Sea. Blue tangs tend to inhabit reefs with clear water.

Aquarium Requirements:

Blue tangs require a spacious aquarium with a minimum capacity of 100 gallons, providing ample hiding spaces. They can become stressed if there are limited hiding spots in the aquarium. As omnivores, they feed on various sources, including fish like plankton. Algae serves as a primary component of their diet, making them content with consuming algae-based fish flakes.

#6 Regal Angelfish

The regal angelfish lives up to its name, as it showcases stunning patterns in shades of blue, yellow, orange, and white. Its breathtaking colouration sets it apart from other fish, making it one of the most magnificent and adorable species.


Regal angelfish can grow to a length of 20 to 30 centimetres. They are typically found in groups consisting of one male and one or more females. When living in their natural habitat, they have a lifespan of around ten years.

Region of Origin:

The colouration of these fish varies based on their geographical regions. For example, the regal angelfish from the Red Sea and Maldives region displays a yellow pattern on its chest, while the angelfish found in the Indo-Pacific region typically has a bluish-grey chest.

Aquarium Requirements:

Managing the regal angelfish can be relatively challenging compared to other species. To establish a harmonious aquarium environment, it is recommended to introduce them to the tank first, allowing them to mark their territory. They require a large tank with a minimum capacity of 125 gallons, providing plenty of hiding spaces. As omnivores, they require a balanced diet that includes both animal-based and plant-based foods.

#7 Betta

The Betta fish, also known as the Siamese fighting fish, earned its name due to its combative nature, symbolizing the fight for survival. These fish are not only visually stunning but also highly sensitive, making them undeniably one of the most attractive and captivating species.

Betta fish display an array of vibrant colours, including shades of red, blue, orange, white, and turquoise.


These fish have a maximum length of three inches. Male Betta fish are generally larger than females, with females growing to around two to two and a half inches, while males can reach sizes ranging from two and a half to three inches.

Region of Origin:

Betta fish are commonly found in calm ponds and slow-moving streams. They typically have a lifespan of two to five years.

Aquarium Requirements:

Given their sensitive nature, Betta fish should only be paired with submissive fish species in an aquarium that provides ample hiding spaces. If they display aggression towards other fish, they need to be housed separately. Betta fish are carnivorous by nature, requiring an animal-based diet for optimal nutrition. While they may survive on plant-based food for a short period, a lack of essential nutrients will ultimately lead to health issues.

Note: It’s important to avoid encouraging or promoting fish fighting. Betta fish can display aggressive behaviour towards their own kind, and it is not recommended to house multiple male Betta fish together.

#8 Rainbow Kribensis

These fish species possess captivating colour combinations, including blue, yellow, green, and red. During the breeding season, the females exhibit a striking and vibrant cherry-red hue on their bodies.


The length of these fish typically ranges from seven to ten centimetres. Females are generally smaller than males and have round abdomens. Particularly during the breeding season, their bellies showcase vivid shades of red and purple.

Region of Origin:

They are primarily found in the mouth of the Ethiope River near the Niger Delta. This region offers a diverse range of water conditions, with slightly alkaline water being prevalent. These fish prefer habitats with dense vegetation and have an average lifespan of five years.

Aquarium Requirements:

These fish tend to swim near the bottom of the aquarium, particularly in areas with thick vegetation. Therefore, it is recommended to house them in a spacious aquarium capable of holding a minimum of twenty gallons of water. They thrive best in slightly alkaline water. As omnivores, they can consume both plant-based and animal-based feeds.

#9 Fancy Guppy

The fancy guppy, also known as the rainbow fish, exhibits stunning colour patterns that capture the attention. With a total of 300 species, guppy fish offer a wide variety of visual appeal.


Females of this species are larger than males, reaching sizes of three to six centimetres, while males typically grow up to three centimetres. Their growth is influenced by their environment, as they tend to grow less when confined to limited spaces compared to being in a freshwater habitat like a river.

Region of Origin:

The fancy guppy is a popular choice for freshwater aquariums and originates from South Africa. These fish are remarkably adaptable and can thrive in various environmental conditions. Their lifespan ranges from one to three years.

Aquarium Requirements:

Fancy guppies are an excellent addition to aquariums, as they enhance the overall beauty of the setup. They thrive best at temperatures ranging from 22 to 27 degrees Celsius. Additionally, they enjoy consuming dried vegetables and frozen worms as part of their diet.

#10 Butterfly Fish

The butterfly fish is a vibrant species of fish that predominantly exhibits black, white, yellow, red, orange, and blue hues. These fish possess a striking pattern adorning their bodies. In their natural habitat, they can live for approximately seven years.


The butterfly fish encompasses a vast array of species, numbering around 129. Their length can range from 12 to 22 centimetres, although certain species can even grow up to 30 centimetres, resembling elongated butterflies.

Region of Origin:

Belonging to the Chaetodontidae family of freshwater fish, the butterfly fish primarily inhabits the Indian, Atlantic, and Pacific oceans. Contrary to the name, it is a freshwater species.

Aquarium Requirements:

For housing a butterfly fish, it is advisable to have a spacious aquarium with a capacity of 75 to 150 gallons of water. These fish are fond of swimming in open areas. It is recommended to include rocks and stones in the aquarium to provide hiding spots and amusement. Their diet mainly consists of regular aquarium food.

Point To Note

However, as with any animal, it is important to provide them with the proper care they need in order to thrive. One of the most crucial aspects of keeping fish in a tank is ensuring that the temperature is at the appropriate level for their species. 

Additionally, providing ample space for the fish to swim and play is essential for their overall well-being. Especially for shy fish, it is important to incorporate hiding spaces into the aquarium. But above all, it is critical to make sure that the fish receive a nutritionally complete diet to support their health. 


Who is the most beautiful fish?

The mandarin fish.

Which fish is very friendly?

The Betta fish. 

Which fish is most playful?

The Discus fish

What is the best fish to have as a pet?

The best fish to have as a pet is one that is easy to care for, hardy, and has a peaceful temperament. In this regard, the Betta fish, also known as the Siamese fighting fish, makes an excellent choice. These fish are available in a variety of colours and have a reputation for being low-maintenance, making them suitable for beginner fish owners. 

Final Words

The above-mentioned fish truly are some of the cutest creatures that can be found in the aquatic world. Their small size and enchanting exteriors are a true work of nature’s art. If you’ve ever wanted to bring a touch of natural beauty into your home, these adorable fish may be just the thing. 

They are not only easy to keep in an aquarium, but they also make wonderful additions to any home tank. With a bit of attention and care, these tiny fish can bring a touch of colour and movement to your living space that is both calming and captivating. If you’re looking to add a bit of beauty and wonder to your everyday life, why not consider one of these delightful creatures?


Author Profile
Zahra Makda
Wildlife Enthusiast | Explorer at Animals Research

Growing up enjoying the beauty of my village, a good passion for nature developed in me from childhood. Following my passion for the natural world, I have chosen zoology for my graduation, during my undergraduate degree, I participated in many nature trails, bird watching, rescues, training for wildlife conservation, workshop, and seminars on biodiversity. I have a keen interest in invertebrate biology, herpetology, and ornithology. Primary interests include studies on taxonomy, ecology, habitat and behavior.

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Growing up enjoying the beauty of my village, a good passion for nature developed in me from childhood. Following my passion for the natural world, I have chosen zoology for my graduation, during my undergraduate degree, I participated in many nature trails, bird watching, rescues, training for wildlife conservation, workshop, and seminars on biodiversity. I have a keen interest in invertebrate biology, herpetology, and ornithology. Primary interests include studies on taxonomy, ecology, habitat and behavior.


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