What fish is also known as butterfish?

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The term “butterfish” refers to several different species, but most commonly it identifies the American butterfish, a small, silvery fish known for its smooth, oily texture and delicate flavor.

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Unraveling the Mystery of the Butterfish: A Comprehensive Guide

The name “butterfish” is a source of considerable confusion in the culinary world and marine biology. While often associated with a delectable, melt-in-your-mouth texture reminiscent of butter, the label encompasses several distinct species found across different oceans. Understanding which fish you’re actually getting when you see “butterfish” on a menu or at the market is crucial for both taste and safety.

The Primary Butterfish: Peprilus triacanthus

The most widely recognized and commercially significant fish referred to as butterfish is Peprilus triacanthus, also known as the American butterfish. This species is found along the Atlantic coast of North America, from Newfoundland to Florida.

They are characterized by their flattened, oval-shaped bodies.
Their silvery color allows them to blend into their environment.
American butterfish rarely exceed 12 inches in length.
They are known for their mild, delicate flavor and high oil content, which contributes to their buttery texture when cooked.

The Imposters: Other Fish Labeled as Butterfish

The term “butterfish” is often misapplied or used interchangeably for other fish, sometimes fraudulently, which can lead to both consumer confusion and potential health risks. These fish often share a similar oily texture, but they are distinct species with varying characteristics. These fish should not be labeled as butterfish.

Escolar (Lepidocybium flavobrunneum) and Oilfish (Ruvettus pretiosus): These are the most frequent culprits in “butterfish” mislabeling. While they have a rich, buttery flavor, they contain high levels of indigestible waxes that can cause keriorrhea (oily orange discharge) in some individuals. Responsible labeling and proper cooking methods are crucial with these species.
Japanese Butterfish or Pacific Pomfret (Eumegistus illustris): Found in the Pacific, this species is another occasional candidate for the “butterfish” designation, although it is less common than escolar and oilfish.
Black Pomfret (Parastromateus niger): Found in the Indo-Pacific, this fish is also sometimes marketed as butterfish.

Distinguishing the Real Deal

Differentiating between the true American butterfish and its imposters can be challenging for the average consumer. Here are a few things to look for:

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Appearance: American butterfish is generally smaller than escolar or oilfish. Escolar and oilfish often have a darker, more metallic appearance.
Texture: All “butterfish” types have a smooth, oily texture.
Source: Inquire about the origin of the fish at your local market or restaurant. Knowing where it comes from can help you determine if it’s the true American butterfish or another species.
Price: Escolar and Oilfish may be less expensive than true American Butterfish.
Labeling: Always check the label carefully and be wary of vague descriptions.

Health Considerations

While American butterfish is generally safe and nutritious to eat, the same cannot be said for all fish marketed as “butterfish.” Escolar and oilfish, in particular, pose a risk due to their high wax ester content. These esters are indigestible and can cause gastrointestinal distress.

Keriorrhea: The primary symptom of consuming too much escolar or oilfish.
Portion Control: Limiting portion sizes can reduce the risk of adverse effects.
Preparation Methods: Grilling or baking can help reduce the oil content.
Consumption Advisories: Consult with local health authorities for consumption advisories.

Culinary Uses and Preparation

American butterfish is prized for its delicate flavor and versatility in the kitchen.

Pan-frying: A simple and quick way to prepare butterfish, highlighting its natural flavor.
Baking: Baking allows the fish to retain its moisture and tenderness.
Grilling: Grilling imparts a smoky flavor.
Smoking: Smoking enhances the richness of the fish.
Sashimi: When exceptionally fresh, American butterfish can be enjoyed as sashimi.

Sustainability

The sustainability of American butterfish fisheries varies depending on the region. Look for certifications from organizations like the Marine Stewardship Council (MSC) to ensure that the fish you are buying comes from a well-managed and sustainable fishery.

MSC Certification: Indicates that a fishery meets strict standards for sustainability.
Fishing Practices: Understanding the fishing methods used can help you make informed choices.
Population Status: Be aware of the population status of the fish in different areas.

The Future of Butterfish Consumption

As consumer awareness of mislabeling and health concerns grows, the future of “butterfish” consumption hinges on transparency and responsible sourcing. Clearer labeling regulations, increased consumer education, and sustainable fishing practices are essential for ensuring that consumers can enjoy this delicious fish without fear.

Frequently Asked Questions (FAQs)

What does Peprilus triacanthus eat?

Peprilus triacanthus, or American butterfish, primarily feeds on small zooplankton, including copepods, larval crustaceans, and other small invertebrates. They are considered opportunistic feeders, meaning they will consume what is available to them in their environment.

How do you cook American butterfish to minimize oiliness?

To minimize oiliness, consider cooking methods that allow excess oil to drain away. Grilling or baking on a rack can be effective. Marinating the fish beforehand can also help to draw out some of the oil.

Is it legal to sell escolar as butterfish?

In many jurisdictions, selling escolar or oilfish mislabeled as butterfish is illegal. This practice is considered fraudulent and can pose a health risk to consumers.

What are the symptoms of keriorrhea?

Keriorrhea, caused by consuming escolar or oilfish, presents as oily orange or yellow diarrhea. The onset can occur within 30 minutes to several hours after consumption.

Can pregnant women eat American butterfish?

Generally, American butterfish is considered safe for pregnant women in moderation, as it is a good source of omega-3 fatty acids. However, it’s important to ensure that the fish is properly sourced and cooked to minimize any potential risks.

Where is American butterfish most commonly found?

American butterfish are commonly found along the Atlantic coast of North America, ranging from Newfoundland, Canada, to Florida in the United States.

How can I tell the difference between American butterfish and Pacific pomfret at the market?

American butterfish is generally smaller and more silvery than Pacific pomfret (Japanese butterfish). Pacific pomfret tends to have a slightly more elongated shape and a darker, bluish-gray color.

What are the nutritional benefits of eating American butterfish?

American butterfish is a good source of omega-3 fatty acids, protein, and vitamin D. It is relatively low in mercury compared to some other fish species.

Is butterfish a sustainable seafood choice?

The sustainability of butterfish varies. Look for certifications like MSC to ensure it comes from a sustainably managed fishery.

What is the shelf life of fresh American butterfish?

Fresh American butterfish should be consumed within 1-2 days of purchase. It is important to store it properly in the refrigerator to maintain its quality and freshness.

Are there any allergies associated with eating American butterfish?

As with any fish, allergic reactions are possible. Individuals with fish allergies should exercise caution and avoid consuming butterfish if they have a known allergy.

What is the best way to store American butterfish?

Store fresh American butterfish in the refrigerator at a temperature below 40°F (4°C). Wrap the fish tightly in plastic wrap or place it in an airtight container to prevent it from drying out and absorbing odors. Pack it in ice to further prolong its freshness.