Buzz
For centuries, fish has been a key component of the human diet. We've learned more about both the benefits and potential risks of consuming fish over time. Many people enjoy the distinct taste and texture of fish, though it's not always the go-to for our vegetarian and vegan friends. Fish is packed with nutrients that can lower the risk of heart disease and stroke. It also plays a vital role in infant brain development.
However, as with most things, balance is essential. Too much of a good thing can have its drawbacks.
Fish often contains mercury and other pollutants, especially considering the state of our oceans. Eating too much fish can lead to dangerous mercury buildup in the body, posing significant risks to pregnant and breastfeeding women and their babies. The U.S. Department of Agriculture has set guidelines and online resources to educate the public on safe fish consumption levels.
The part of the fish consumed often depends on cultural norms, traditions, and location. In the U.S., fish fillets are common, and the remaining parts are typically discarded. Although fish might not appear on our plates daily, fish products are a part of many people's lives every day. As global demand for fish continues to rise, both fishermen and scientists are working to find sustainable uses for fish waste and by-products.
Let’s explore further…
10. Biodiesel
Fossil fuels are a finite resource, meaning once they're gone, there's no way to replenish them. It's not exactly practical to wait millions of years for more to form. Thankfully, scientists have already started seeking out alternative, sustainable energy sources. From wind turbines to solar panels to electric vehicles, the search for cleaner energy solutions continues.
An innovative idea emerged to create a cheaper, yet efficient energy source using fish by-products. Every year, fish processing plants generate billions of tons of fish waste. Typically, this waste—bones, skin, and even fish heads—is discarded back into the ocean, further contributing to pollution. But through eco-friendly biodiesel production, fish waste is pressed to extract the fish oil, which serves as the base for the biofuel. Additional compounds are added to make it suitable for use in car engines and even planes.
9. Cosmetics
Have you ever considered using fish skin for your skincare routine? We all strive to look our best, don't we? It feels even better when we can use a product that not only benefits us but also helps the environment. In the beauty and cosmetic world, collagen is famous for its wrinkle-fighting and skin-enhancing properties.
Marine collagen, which is derived from fish skin, offers the same benefits as mammalian collagen (LINK 6). It can be used as a moisturizer to combat signs of aging. It might even become your new go-to product for your daily skincare regimen. Other beauty products made from fish by-products include nail polish remover, hair gel, and certain makeup applications—all utilizing fish by-products as their foundation.
8. Gelatin
Can you imagine enjoying fish gelatin in a dessert like strawberry-flavored cups? Or perhaps savoring cranberry vodka shots with a touch of fish gelatin to wind down after a busy week? Personally, I never thought of fish as a dessert ingredient. Gelatin is traditionally made from cow and pig by-products, but it's also derived from—you guessed it—fish. While it may not completely replace mammal-based gelatin, it provides an alternative for those with religious or dietary concerns.
However, fish gelatin has some distinct chemical differences from its mammalian counterpart. For example, fish gelatin has a lower gelling point—the temperature at which it begins to solidify. Studies show that fish gelatin works wonderfully in frozen desserts like ice cream. Just like gelatin from mammals, fish-based gelatin can also be used as a food additive.
7. Animal Feed
Fish by-products are commonly used in animal feed and pet food. While this might not be surprising to many, those without pets or knowledge of livestock may not realize how beneficial fish can be for animals. Just like humans, animals benefit from the protein-rich nutrients found in fish, which promote growth and development in pets and livestock alike.
Furthermore, the growing demand from animal lovers for high-protein, nutritious food and treats for their pets has opened up a market for new meat sources. Fish skin, rich in protein and low in ash content, is a prime candidate for animal feed and pet food production. With U.S. consumers spending over $42 billion on pet food in 2020, and Millennials increasingly seeking organic options, the need for safe and sustainable sources is clear. This is where fish by-products can truly make a difference.
6. Food Packaging
One of the most frustrating moments when snacking is struggling to open a package, especially when you're hangry. That said, well-designed packaging not only keeps your snack fresh but also preserves its flavor and extends its shelf life. Good packaging is key to ensuring your favorite treats stay tasty for longer.
To create effective food packaging, companies typically rely on plastic films. However, fish skin offers a sustainable alternative in the form of a thin, biodegradable film. Gelatin films made from fish skins serve as excellent barriers, protecting against oxygen and oil. Although it may seem unappetizing, this fish-derived film could reduce our dependence on plastic packaging. As long as this fishy cling film is easy to handle and doesn't fold on itself, we’re good to go!
5. Pharmaceutical and Medical
Fish by-products play an important role in the pharmaceutical and medical sectors. Fish oil, in its liquid form, is a popular dietary supplement, as is marine collagen. These supplements come in various forms, including liquid, powder, and capsules. For example, fish gelatin is used to coat medicine capsules or create gummy vitamins, which are loved by both children and adults.
Even with a fish-rich diet, you may still be missing some essential fatty acids. Fish-coated supplements are a convenient way to consume these crucial lipids, which can help reduce the risk of cardiovascular diseases, hypertension, and autoimmune or inflammatory conditions.
Studies have shown that fish by-products also have potential applications in medical products, such as artificial human skin, high-quality absorbable sutures, and materials used to control bleeding during microsurgeries.
4. Clothing and Accessories
Fish are always in vogue—from their vibrant colors to mermaid-tail-inspired designs to fishnet stockings. Whether as a literal or inspirational theme, incorporating fish into your wardrobe is not for the fashion faint of heart.
In the past, Nordic cultures used fish skins to craft shoes and pants. They also used them to make accessories like bags or sacks. Picture a stylish pair of leather fish-skin boots paired with a matching fin-tastic bag. Today, fish-skin leather cowboy boots are considered a symbol of luxury, even in the U.S. One designer has even ventured into creating sunglasses from salmon skin.
3. Fertilizer
Do you have a green thumb? Fish by-products are commonly used as fertilizer. Often referred to as fish offal, this term encompasses all the discarded parts of the fish, such as the eyes, head, heart, swim bladder, tail, scales, eggs, and milt. Fish offal is widely used in organic agriculture as a natural, sustainable way to enrich soil while promoting the growth of quality food. Due to its nutrient-packed composition, low cost, and quick decomposition, fish offal is an ideal fertilizer.
Fish offal has many other uses that didn’t make the top ten list. For instance, isinglass, which is made from dried fish bladders, is sometimes used to clarify beverages like beer, wine, and vinegar. Another example is dried salmon skins, now promoted as a nutritious snack. There are numerous recipes incorporating fish offal, encouraging us to embrace the idea of eating from nose to fin.
Scientists and fishermen continue to seek innovative ways to utilize the vast amounts of fish waste generated every year. However, we can contribute too. How? Start by brainstorming. How might fish oil be used in practical ways? How can we minimize fish exploitation? Share your ideas with a friend and don’t hesitate to speak up. Perhaps your next idea could be the breakthrough the world needs.
2. Photography and Electronics
While film photography might feel like a thing of the past, new technologies are emerging. To make things more eco-friendly, scientists have developed biodegradable films for photography and electronic devices.
Fish scales are being used to create thin, transparent films for flat electronics such as logo displays and flat-panel screens. These films add flexibility and promote a more sustainable, environmentally-friendly approach. Similar to their use in food packaging, fish gelatin-treated films also enhance the longevity of physical photographs—the ones you can hold in your hands, not just view digitally.
1. Household Items
Take a moment to glance around your surroundings, whether at home or elsewhere. With very little effort, you’ll likely spot at least three items that contain fish by-products. While these exact items may not be in your space, similar products are already out there.
Fish waste is utilized in creating a variety of everyday items such as soaps, candles, lubricants, rubber, detergents, printing ink, paint, varnishes, and adhesives. Fish glue is frequently used to bind materials like wood, paper, or leather, and is known for its quick-setting properties. Candles are also made using oils derived from fish by-products. The possibilities for new, functional products crafted from repurposed fish waste are endless.
