Halibut Vs Flounder (Their Similarities and Differences)

Understanding the differences between flounder and halibut is an important skill for anglers and seafood lovers alike. By exploring into their unique features, habitats, and culinary qualities, we can gain a deeper appreciation for these remarkable fish.  

Halibut Vs Flounder: What’s the Difference?

Flounder is the general term used to refer to various flatfish species, including fluke, plaice, and turbot. A flounder is a part of the flatfish family.

Halibut vs Flounder

Halibut, on the other hand, is a kind of flatfish and a specific type of flounder. While all halibut can be classified as flounders, not all flounders are halibut.

All flatfish have a diamond shape and are known for their mottled appearance. Flounder and halibut, being part of the flatfish family, share these common characteristics. It’s their specific features and habitats that set them apart.

Physical Characteristics 

Let’s compare their physical characteristics. 

Body Shape, Size, and Tail 

Flounder have round bodies, much rounder than the elongated and diamond-shaped body of halibut. Flounder typically grow to lengths of around 1-2 feet, while halibut can reach impressive sizes of up to six feet long.

Halibut have a forked tail, which provides a streamlined appearance; flounder have a rounded tail.

Eye Positioning (Left-Eyed vs. Right-Eyed) 

Flounder species have a unique ability to camouflage themselves by changing the color and pattern of their skin to match their surroundings. Most flounders, including halibut, have both eyes positioned on one side of their body.

However, the distinction between left-eyed flounder and right-eyed flounder is important. Left-eyed flounders, like the summer flounder, have both eyes on the left side, while right-eyed flounders, like the halibut, have both eyes on the right side.

Key Difference: Halibut have eyes on the right side; flounders have eyes on the left.


Halibut are much bigger. While flounder typically range from a few pounds to around thirty pounds, halibut can grow to be several hundred pounds in weight.

Their enormity makes halibut a favorite among seafood lovers looking for a substantial and meatier fish for frying or grilling.  

The larger size of halibut makes them a popular trophy catch. I’ve reeled in many halibut in my day and I think they’re extremely fun to catch. 

Key Difference: Halibut are bigger. 

Habitat and Distribution

Flounder can all over the place, from the Gulf of Mexico to the Atlantic Ocean. They are demersal fish, meaning they live at or near the seafloor.

They thrive in coastal areas with sandy or muddy bottoms.

Halibut typically reside in the northern waters, particularly along the Atlantic and Pacific coasts. They are known for their preference for colder temperatures.

Halibut fishing is popular in areas like Alaska and the US Pacific coast.

Fishing and Angling

Most people fish for flounder with baited hooks, typically with shrimp or squid.

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I’ve used flounder rigs and Carolina rigs myself to great effect. 

For halibut you want to troll or jig. Large swimbaits or artificial lures resembling small fish can also be effective. 

Target flounder during their feeding times, usually during the ebb tide.

With halibut, focus on areas with rocky structures or underwater canyons, as these fish often seek shelter and ambush prey near these structures. Timing is crucial–halibut are more active during low-light periods, like dawn or dusk.

Culinary Preparation

Flounder, a lean fish known for its delicate and flaky texture, provides a mild and subtle flavor. It is one of the least fatty fishes. 

Halibut offers a meaty and dense texture with a clean, sweet flavor. 

Both lend themselves well to various cooking methods, each accentuating their unique characteristics.

Flounder’s delicate nature makes it a great fish to fry or bake. All founder, but especially Southern Flounder, pair well with light sauces, herbs, and citrus-infused preparations.

Halibut, like Atlantic Halibut and Pacific Halibut, with their dense and meaty texture, can withstand grilling, broiling, or even pan-searing without falling apart. Their firm flesh holds up to robust seasonings, marinades, and glazes, and the meat’s natural sweetness shines when paired with bolder flavors like garlic and soy-based sauces.

Flounder Vs. Halibut: The Taste Test

Whether you prefer the delicate flakiness of flounder or the meatier texture of halibut, both fish species offer a wide range of culinary possibilities.

Verdict: in our opinion, halibut tastes better. 

Nutritional Benefits 

Both types of fish are lean sources of protein, making them excellent choices for individuals seeking to incorporate more protein into their diet. Additionally, they are rich in omega-3 fatty acids, which have been associated with various health benefits, including reducing inflammation, improving heart health, and supporting brain function.

They’re also  excellent sources of selenium, a mineral that acts as an antioxidant, supporting the immune system and promoting cellular health.

And both species contain niacin and vitamin B6.

Furthermore, they are low in saturated fat and calories, making them a nutritious choice for those looking to maintain a healthy weight.


While both species belong to the same family, they have distinct characteristics. Flounder have a round body shape, eyes on the right side, and are smaller, while halibut are larger with eyes on the left side. 

If you’re planning on eating them, some may prefer the delicate and flaky texture of flounder, while others enjoy the meatier and more substantial bite of halibut. 

As a seafood lover and a fisherman, I catch and prepare both of them often fairly often and love both species. Give them a shot! 

We hope this guide has helped you understand the main differences between flounder and halibut. And if you’re looking for a halibut recipe, check this one out–it’s great!


What is the difference between halibut and flounder?

Halibut are large fish, whereas flounder are smaller in size.

Are halibut and flounder similar in any way?

Yes, halibut and flounder are similar in that they both belong to the same family of flatfish.

Where can halibut be found?

In the waters around the US, particularly in the Gulf of Maine, California, and Mexico to the Gulf.

Where can flounder be found?

In various locations, such as the Gulf of Maine, Cape Cod, and even as far as Greenland.

Are halibut and flounder both found in saltwater?

Yes, both halibut and flounder are saltwater fish.

What is the body shape of flounder and halibut?

Flounder and halibut have similar body shapes, with both having a flattened and elongated body, but flounder are smaller and rounder and halibut have a forked tail and a streamlined appearance. 

Do halibut and flounder have similar fins?

Yes, both halibut and flounder have dorsal and anal fins on the same side of their body.

How do halibut and flounder differ in terms of fishing?

Halibut fishing is popular and highly sought after, whereas finding flounder may require more effort.

Can halibut and flounder be used for cooking?

Yes, both halibut and flounder are delicious fish and can be cooked in various ways.

Are there any restrictions on consuming halibut or flounder?

Halibut can sometimes be restricted in certain regions due to conservation efforts, while flounder is generally safe for consumption.

Image Credits
Photo 1 by The National Gallery of Art
Photo 2: Flounder drawn by Fe. Clarke (1849-1899); original from Museum of New Zealand
Photo 3: Atlantic halibut from The Natural History of British Fishes (1802) by Edward Donovan. Original from the New York Public Library.
Photo 4 by James Brooks

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