65+ Universally Found Fish Names Starting with Letter U

If you’re looking for unique, exotic fish names that start with the letter U, you’ve come to the right place. In this comprehensive guide, we’ll introduce you to 25 different fish species whose common names begin with the letter U. From freshwater to saltwater, from small to large, there’s a variety of fish on this list for all types of aquarium enthusiasts.

1. Unicorn Fish

The Unicorn Fish, also known as the Naso tang, is a popular choice among marine aquarists. Its elongated, unicorn-like snout and vibrant blue coloration make it a striking addition to any tank. Unicorn Fish are known to be peaceful and hardy, making them a great choice for beginner saltwater hobbyists.

2. Upside-Down Catfish

As the name suggests, the Upside-Down Catfish is unique in that it swims belly-up most of the time. These peaceful bottom-dwelling fish are native to Africa and can make an interesting addition to a community tank. These fish are also known to be excellent scavengers, making them great tank cleaners.

3. Uaru Cichlid

The Uaru Cichlid, native to the Amazon River basin, is a stunning freshwater fish with brightly colored scales and distinctive red eyes. They are relatively peaceful but can become territorial during breeding season. These fish do best in large tanks with plenty of hiding spots and a well-balanced diet.

4. Umbrella Catfish

The Umbrella Catfish, also known as the Panda Corydoras, is a small but eye-catching fish with black and white patterning that resembles an umbrella. These sociable bottom-dwellers do best in groups and are relatively easy to care for. They are a great addition to a peaceful community tank.

5. Upland Swordtail

The Upland Swordtail is a colorful and active fish that originates from Central America. These fish get their name from the elongated sword-like projection on their tails, which are longer in males than females. They are relatively hardy and can thrive in a variety of water conditions.

6. Uaru Fernandezyepezi

The Uaru Fernandezyepezi, also known as the Blue Acara, is a stunning freshwater fish with blue-green scales and red eyes. They are relatively peaceful but can become territorial during breeding season. These fish do best in large tanks with plenty of hiding spots and a well-balanced diet.

7. Upside-Down Loach

Native to Southeast Asia, the Upside-Down Loach is a small but intriguing fish that spends most of its time swimming upside down near the water’s surface. They are peaceful and can do well in community tanks with other non-aggressive fish. These loaches also love to burrow, so providing them with sand or fine substrate is recommended.

8. Ugly Duckling Pleco

Despite its name, the Ugly Duckling Pleco is actually quite a beautiful fish with a unique pattern of black and white stripes. These peaceful bottom-dwellers are native to South America and can make a great addition to a community tank. They also love to munch on algae, making them great tank cleaners.

9. Uaru Amphiacanthoides

The Uaru Amphiacanthoides, also known as the Diamond Cichlid, is a popular choice among aquarists due to its stunning diamond-shaped scales and vibrant colors. They are relatively peaceful but can become territorial during breeding season. These fish do best in large tanks with plenty of hiding spots and a well-balanced diet.

10. Unicorn Sleeper Goby

The Unicorn Sleeper Goby, also known as the Banded Shrimp Goby, is a fascinating fish that forms a symbiotic relationship with pistol shrimp in the wild. These peaceful fish do best in pairs and require sandy substrate for burrowing. They also love to sift through the sand for food, making them excellent tank cleaners.

11. Umbrella Molly

The Umbrella Molly is a peaceful and active fish that originates from Central America. These fish get their name from the unique shape of their dorsal fin, which resembles an umbrella when fully extended. They are relatively hardy and can thrive in a variety of water conditions.

12. Upside-Down Catfish

The Upside-Down Catfish, also known as the Glass Catfish, is a popular and unique fish that has transparent skin allowing you to see its inner organs. These peaceful fish do best in groups and require ample hiding spots in their tank. They are great scavengers and will eat leftovers at the bottom of the tank.

13. Uaru Nattereri

The Uaru Nattereri, also known as the Silver Dollar Fish, is a stunning freshwater fish with round silver scales and red eyes. They are peaceful but can become territorial during breeding season. These fish do best in large tanks with plenty of hiding spots and a well-balanced diet.

14. Unicorn Tang

The Unicorn Tang, also known as the Blonde Naso Tang, is a popular choice among marine aquarists. Its elongated unicorn-like snout and vibrant blue coloration make it a striking addition to any tank. These fish are known to be peaceful but require plenty of swimming space due to their large size.

15. Upside-Down Pike Cichlid

The Upside-Down Pike Cichlid, also known as the Giant Pike Cichlid, is a large and aggressive fish native to South America. They are best kept in a species-only tank or with other large, aggressive fish. These impressive predators require plenty of swimming space and a varied diet.

16. Uaru Fernandezyepezi

The Uaru Fernandezyepezi, also known as the Black Acara, is a stunning freshwater fish with black and white scales and red eyes. They are relatively peaceful but can become territorial during breeding season. These fish do best in large tanks with plenty of hiding spots and a well-balanced diet.

17. Umbrella Cichlid

Native to South America, the Umbrella Cichlid is a unique fish with a triangular-shaped head and bright orange coloration. These peaceful fish do best in groups and require plenty of hiding spots in their tank. They are also known for their loud grunting sounds during breeding season.

18. Upside-Down Hatchetfish

The Upside-Down Hatchetfish is a small and peaceful fish that is native to the Amazon River basin. They are known for their distinctive shape, which allows them to swim upside down near the water’s surface. These fish do best in groups and require a well-planted tank with floating plants for cover.

19. Unicorn Surgeonfish

The Unicorn Surgeonfish, also known as the Blonde Naso Tang, is a popular and striking addition to marine tanks. They are known for their elongated unicorn-like snout and vibrant blue coloration. These peaceful fish require plenty of swimming space and a varied diet.

20. Upside-Down Platy

The Upside-Down Platy is a small but active fish that originates from Central America. These fish get their name from the unique shape of their dorsal fin, which resembles an umbrella when fully extended. They are relatively hardy and can thrive in a variety of water conditions.

21. Uaru Cichlid

The Uaru Cichlid, also known as the Triangle Cichlid, is a striking freshwater fish with triangular-shaped scales and red eyes. They are peaceful but can become territorial during breeding season. These fish do best in large tanks with plenty of hiding spots and a well-balanced diet.

22. Umbrella Goby

The Umbrella Goby, also known as the Banded Shrimp Goby, is a fascinating fish that forms a symbiotic relationship with pistol shrimp in the wild. These peaceful fish do best in pairs and require sandy substrate for burrowing. They also love to sift through the sand for food, making them excellent tank cleaners.

23. Unicorn Loach

The Unicorn Loach, also known as the Sumo Loach or King Tiger Pleco, is a unique and sought-after fish among aquarists. These bottom-dwellers are known for their distinctive orange and black stripes. They require a well-oxygenated tank with plenty of hiding spots and a varied diet.

24. Upside-Down Corydoras

The Upside-Down Corydoras, also known as the Skunk Cory, is a small and peaceful fish that hails from South America. These bottom-dwellers are known for their black and white striped pattern and their ability to swim upside down. They do best in groups and require a well-planted tank with soft substrate.

25. Uku

Last but not least, we have the Uku, also known as the Pacific Blue Marlin, which is a highly prized game fish among anglers. These massive creatures can reach up to 2,000 pounds and are known for their powerful speed and agility in the water. They can be found in tropical and subtropical waters around the world, making them a popular target for sport fishing. However, due to overfishing, the Uku population has declined in recent years, leading to conservation efforts to protect this magnificent species.

More Fish Names Starting with Letter U

S.No	Fish Name	Description
1	Unicornfish	Named for the horn-like protrusion on their heads, they’re a type of surgeonfish found in tropical waters.
2	Upside-Down Catfish	Known for their unusual habit of swimming upside down, they’re a popular freshwater aquarium fish.
3	Uaru Cichlid	Known for their unique body shape and ability to change color depending on mood.
4	Umbrella Mouth Gulper Eel	Deep-sea eel known for its large mouth and ability to swallow prey much larger than itself.
5	Undulate Ray	Known for their wavy-edged bodies and beautiful markings, they’re found in the Indian and Pacific Oceans.
6	Uganda Spotted Barb	A small, schooling fish known for the black spots along their sides.
7	Umbra Pike	A predatory freshwater fish native to Europe, known for its elongated body and sharp teeth.
8	Unicorn Leatherjacket	Named for the horn-like spine on their heads, they’re a type of filefish found in Australian waters.
9	Unicorn Tang	A type of surgeonfish known for the horn-like projection on their heads.
10	Undulated Triggerfish	Known for their wavy, undulating lines, they’re a colorful reef dweller.
11	Upland Bully	A small freshwater fish native to New Zealand, known for their hardiness and adaptability.
12	Urutu Wolf Fish	A large, predatory fish known for their aggressive behavior and sharp teeth.
13	Utaka	A type of cichlid found in Lake Malawi, known for their peaceful nature and vibrant colors.
14	Umbrella Fish	Known for their large, fan-like pectoral fins, they’re a type of deep-sea fish.
15	Uranoscopus Scaber	Also known as the stargazer, this fish is known for its upward-facing mouth and eyes.
16	Uganda Clawed Frog	Although not a fish, but an amphibian, it’s included due to its aquatic nature.
17	Undulated Moray	A type of eel known for its undulating body pattern and sharp teeth.
18	Ural Sturgeon	A large freshwater fish known for producing high-quality caviar.
19	Umbra Dogfish	A small, deep-water shark known for its elongated body and large eyes.
20	Umpqua Chub	A small, freshwater fish native to the Umpqua River in Oregon, USA.
21	Upland Combtooth Blenny	A small, rock-dwelling fish known for their comb-like teeth.
22	Ulua	A type of jack fish, known for its strength and speed, popular among sport fishermen.
23	Ungava Cod	A cold-water fish found in the North Atlantic, known for its tasty flesh.
24	Unicorn Cod	Known for the horn-like protrusion on its head, it’s a deep-water species found in the Southern Hemisphere.
25	Unspotted Sawtail Catshark	A small, bottom-dwelling shark known for its lack of spots and saw-like tail.
26	Ucayali Puffer	A freshwater pufferfish found in the Ucayali River in Peru.
27	Umbrella Knifefish	Known for their long, knife-like bodies, they’re a type of electric fish found in South America.
28	Umbrellamouth Gulper	A deep-sea fish known for its large, umbrella-like mouth.
29	Unicorn Filefish	Known for the horn-like spine on their heads, they’re a type of filefish found in the Pacific Ocean.
30	Unicorn Goby	A small, bottom-dwelling fish known for the horn-like projection on its head.
31	Unicorn Shrimp Eater	A small, predatory fish known for feeding on shrimp, found in the waters of New Zealand.
32	Unicorn Sole	A flat, bottom-dwelling fish known for the horn-like projection on its head.
33	Ushi Fish	A small, schooling fish native to Japan, known for their bright colors.
34	Utah Chub	A small, freshwater fish native to the Western United States, known for their silvery color.
35	Utah Sucker	A large, bottom-dwelling fish found in the rivers and lakes of the Western United States.
36	Umbrella Cichlid	A type of cichlid known for the large dorsal fin that resembles an open umbrella.
37	Uganda Mouthbrooder	A type of cichlid known for their parental care, where the female carries the eggs in her mouth.
38	Ural Rex Catfish	A small, bottom-dwelling catfish known for its whisker-like barbels.
39	Ulua Hawaiian Jack	A large, predatory fish known for its strength and speed, popular among sport fishermen.
40	Underjaw Bonito	A fast-swimming predatory fish, known for the distinctive shape of its jaw.

Conclusion:

In conclusion, there are a variety of fish that start with the letter U, each with their own unique characteristics and qualities. From peaceful community fish to large and aggressive predators, these fish provide endless options for aquarium enthusiasts. Whether you’re looking for a colorful addition to your freshwater tank or an impressive game fish for deep-sea fishing, the world of aquatic creatures has something for everyone