Fish That Start With I

Fish That Start With I [Full List]

Greetings, fish enthusiasts! Today, we embark on a thrilling journey through the vast and wondrous world of fish that start with the letter “I”. Prepare to be dazzled by the incredible diversity of aquatic life that we will encounter on our quest.

From the icy waters of the Antarctic to the tropical streams of Southeast Asia, these fish have adapted to a wide range of environments and evolved into some of the most fascinating and unique creatures on the planet.

Join us as we explore the depths of the ocean and the hidden corners of freshwater ecosystems in search of these elusive and remarkable fish that start with I.

Fish That Start With I

Ice Blue Red Top Zebra

This fascinating species of fish is truly a marvel to behold! The Ice Blue Red Top Zebra, also known by its scientific name, Danio rerio, is a freshwater fish that belongs to the minnow family. Its elongated body is adorned with distinctive horizontal stripes that alternate between a shimmering silver-blue hue and a striking red color that tops the dorsal fin.


The Icefish is a unique species of fish that inhabits the frigid waters of the Southern Ocean. This remarkable creature is characterized by its lack of hemoglobin, the protein that carries oxygen in the blood. Instead, the Icefish has evolved a system of blood vessels that allow oxygen to diffuse directly from the water into its tissues, making it one of the few vertebrates that can survive without red blood cells.

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The Ide, also known as Orfe, is a freshwater fish native to Europe and Asia. This graceful species is often prized for its attractive silver-blue scales, which give it a shimmering appearance in the water. With a slender body and deeply forked tail, the Ide is a skilled swimmer that can reach speeds of up to 40 mph!


The Ilish, also known as Hilsa or Ellis, is a type of fish that is popular in the cuisine of South Asia. This oily fish is known for its distinctive flavor and is often served smoked or fried. The Ilish is also an important cultural symbol in the region and is featured prominently in art, literature, and music.


The Ilisha, also known as Shad or Whitebait, is a small fish that is found in coastal waters and estuaries around the world. This slender species is often used as bait for larger game fish, but it is also prized for its mild, delicate flavor when cooked. Some varieties of Ilisha are also considered to be endangered due to overfishing and habitat loss.


The Inanga, also known as the Whitebait or Galaxias maculatus, is a small freshwater fish that is found in rivers and streams in New Zealand. This diminutive species is known for its distinctive coloration, which features a silvery body with dark, irregular spots. Inanga are often harvested for human consumption and are considered a delicacy in some parts of the country.


The Inconnu, also known as the Sheefish, is a freshwater fish that is native to the Arctic regions of North America. This large, slow-growing species is known for its delicate, white flesh and is an important subsistence food for Indigenous peoples in the region. The Inconnu is also popular with sport fishermen, who prize it for its size and fighting ability.

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Indian Glassfish

The Indian Glassfish, also known as the Glass Perch or Parambassis ranga, is a freshwater fish that is native to the rivers and streams of South Asia. This translucent species is named for its glassy appearance, which allows its internal organs to be seen through its skin. The Indian Glassfish is a popular aquarium fish, but it is also used as a food fish in some parts of its range.

Indian Spiny Loach

The Indian Spiny Loach, also known as the Kuhli Loach or Pangio kuhlii, is a small freshwater fish that is native to Southeast Asia. This eel-like species is characterized by its elongated body and sharp, spiny fins. The Indian Spiny Loach is often kept in aquariums as a pest control measure, as it feeds on small snails and other unwanted invertebrates.

Inexpectatum Pleco

The Inexpectatum Pleco, also known as the L031 or Orange Seam Pleco, is a freshwater fish that is native to the Amazon Basin in South America. This fascinating species is named for its unique coloration, which features a vibrant orange stripe running the length of its body. The Inexpectatum Pleco is a popular aquarium fish due to its striking appearance and its ability to help keep tanks clean by consuming algae.

Iridescent Shark

The Iridescent Shark, also known as the Siamese Shark or Pangasianodon hypophthalmus, is a freshwater fish that is native to Southeast Asia. Despite its name, this species is not actually a shark, but rather a type of catfish. The Iridescent Shark is known for its distinctive, silvery coloration and its long, slender body, which can grow up to 4 feet in length. This species is often farmed for food and is a staple of traditional Southeast Asian cuisine.

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In conclusion, the world of fish that start with “I” is a truly remarkable and awe-inspiring realm. From the elusive Icefish to the majestic Iridescent Shark, each species has its own unique characteristics and adaptations that allow it to thrive in its particular environment.

Whether you are an avid fish enthusiast or simply a lover of nature, there is something truly magical about these creatures that never fails to captivate and inspire. So the next time you find yourself near a body of water, take a moment to appreciate the incredible diversity of aquatic life that surrounds us, and remember the amazing fish that start with the letter “I”.