Your Questions Answered

We’ve gathered the most frequently asked questions to make it easy to learn more about our products, how they’re made, and what goes into every can of Sirena. Explore the answers below or reach out if you need more information.

Your Questions Answered

We’ve gathered the most frequently asked questions to make it easy to learn more about our products, how they’re made, and what goes into every can of Sirena. Explore the answers below or reach out if you need more information.

canned tuna

What is the best type of tuna?


At Sirena, we consider yellowfin tuna to be one of the best types of tuna for canned products. It offers the ideal balance of flavour, texture, and quality—with a mild yet rich taste that’s less fishy than skipjack and more flavourful than albacore. Its firm, meaty texture holds up beautifully in salads, pasta dishes, or enjoyed straight from the can.

Is tuna a healthy source of protein?


Yes — tuna is a naturally lean, high-quality source of protein, making it a smart choice for a health-conscious diet. Our tuna not only tastes great but also delivers essential nutrients like omega-3 fatty acids, Bvitamins, and minimal saturated fat. According to the Nutrient Reference Values used by FSANZ, adults require protein in amounts designed to maintain health and prevent deficiency.

Read more on this link.

Does Sirena use GMOs in their products?


No, we don’t use genetically modified organisms (GMOs) in our products. We are committed to using all-natural ingredients whenever possible to ensure the highest quality and purity. Our tuna is wild-caught and naturally GMO-free, and we carefully source any other ingredients to meet our strict natural standards. At Sirena, we believe in providing wholesome, transparent, and authentic food without genetic modification.


Can I freeze Sirena tuna?

Unopened cans or jars of Sirena tuna should be stored in a cool, dry place and not refrigerated or frozen, as this can affect the quality and integrity of the packaging.

Once opened, any unused tuna should be transferred to a clean, airtight container:

  • Refrigerate and consume within 1–2 days for best quality.
  • Freeze if needed — it’s safe to do so, but please note the texture may change slightly once thawed. Use within 1–2 months.

I found a bone, what next?


Our tuna is carefully hand-cleaned and packed to ensure the highest quality. However, as tuna is a natural product, small bones can occasionally be missed during processing. While this is rare, we understand it can be unexpected, and we sincerely apologise for any inconvenience.

The canning process includes a heat treatment called retorting, which softens any small bones that may remain.

These softened bones are safe to consume and can even be a natural source of calcium.

We appreciate your understanding and remain committed to delivering the best possible product.

Can I buy direct from you? 


Unfortunately, we don’t sell directly to consumers, nor do we export our products overseas.

We’re sorry we couldn’t assist on this occasion, but we appreciate your interest in Sirena and hope you’re able to find our products through local stockists.

What is Pole and Line (Sustainability)?

In 2010, Sirena made a public commitment to source 100% of our tuna using Pole and Line Fishing, the only sustainable method for tuna harvesting. We also developed a Code of Ethical Sourcing to govern our activities with all of our stakeholders across the globe, including our suppliers, to ensure our commitment to sustainability is strictly adhered to by all.

Sirena Tuna is a proud member of the International Pole & Line Foundation (IPLNF), an organisation that works with one-by-one tuna fisheries worldwide to improve management and enhance best practices for sustainability.

As a member of the IPNLF, Sirena supports the highest level of sustainable fishing. Each fish is individually caught so as to limit the impact on tuna stocks and ensure other species are not accidentally caught. This also means that fish are handled more gently, which improves the quality of our tuna products. Not only is pole and line fishing more efficient, it is also good for local communities because it brings employment opportunities to coastal regions. Unlike pole and line fishing, foreign purse seine fleets have impacted local fishing communities and result in significantly more by-catch.

You can read more about the IPNLF strategic plan and its members commitment on their website ipnlf.org

Does Sirena cans contain BPA? 


We are pleased to inform you that the internal lacquers used in our tuna cans fully comply with the regulations set by Food Standards Australia and New Zealand (FSANZ), the US FDA, and the European Union.

Our cans are BPA-NI, meaning no BPA is intentionally added during the production process. However, because BPA is naturally present in the environment, it is not possible to guarantee absolute zero traces.

We take food safety and product quality very seriously and continuously monitor our manufacturing to ensure compliance with all relevant safety standards.

Why do you use seed oils? 


Some of our tuna products now use a carefully balanced blend of oils, including sunflower oil, to ensure consistency, taste, and texture — while maintaining the quality you expect from Sirena.
We understand and respect your preference for olive oil, and still offer options made with 100% olive oil, including:

  • Sirena Tuna in Italian Style Olive Oil Lite (95g)
  • Sirena Tuna Fillets in Olive Oil (200g jar)

These remain popular with customers seeking products without seed oils.

Does Sirena tuna contain mercury?

Nearly all fish contain some amount of mercury, a naturally occurring substance that accumulates in fish over time. However, the levels vary significantly, with large, predatory, and long-lived fish having much higher concentrations than smaller, younger, and less predatory fish.

At Sirena, we use Yellowfin Tuna (Thunnus Albacares) in our canned tuna products, which is caught using the most sustainable method – Pole and Line fishing. This method is not only environmentally responsible but also highly selective, which allows for the catch of smaller Yellowfin tuna near the surface of the water.

Because we use smaller and younger tuna, the levels of mercury in our products are naturally lower. This is supported by Food Standards Australia New Zealand (FSANZ), which states:

“Canned tuna generally has lower levels of mercury than tuna fillets because smaller tuna species are used, and the tuna are generally younger when caught. Canned tuna and a variety of other types of non-canned tuna can be consumed according to the recommendations in the Australian Dietary Guidelines.”

You can find more details in the FSANZ brochure here:
Mercury in Fish – FSANZ

In addition, our products are regularly tested as part of our quality assurance process, and mercury levels consistently fall well below the maximum limit set by FSANZ (0.5 mg/kg for canned tuna).

We take the safety and quality of our products very seriously and are committed to providing consumers with safe, high-quality tuna that they can trust.

What is Pole & Line Fishing? What is IPLF?

Pole and Line is a fishing method widely recognised as the most sustainable for commercial tuna harvesting. This approach ensures each fish is caught individually, helping to reduce by-catch, protect vulnerable marine species, reduce plastic waste and support coastal communities through local employment and the preservation of traditional fishing practices.

We source our Yellowfin tuna only from certified pole and line fisheries, where fishing zones are specifically protected for this method. Across our supply chain, we work closely with partners to uphold responsible sourcing and maintain high operational standards.

Sirena is also a proud member of the International Pole & Line Foundation (IPNLF), which promotes one-by-one fishing methods and collaborates across science, policy, and supply chains to support responsible fisheries. We support IPNLF’s efforts to improve data transparency and uphold catch limits that protect tuna stocks and empower small-scale fisheries. For more information please go to Home – IPNLF

Is Sirena tuna sustainable?

At Sirena, sustainability is central to everything we do. Since 2010, we’ve publicly committed to sourcing 100% of our tuna using pole and line fishing—a method widely recognised as the most sustainable for commercial tuna harvesting. This approach ensures each fish is caught individually, helping to reduce by-catch, protect vulnerable marine species, reduce plastic waste and support coastal communities through local employment and the preservation of traditional fishing practices.

We source our Yellowfin tuna only from certified pole and line fisheries, where fishing zones are specifically protected for this method. Across our supply chain, we work closely with partners to uphold responsible sourcing and maintain high operational standards.

Sirena is also a proud member of the International Pole & Line Foundation (IPNLF), which promotes one-by-one fishing methods and collaborates across science, policy, and supply chains to support responsible fisheries. We support IPNLF’s efforts to improve data transparency and uphold catch limits that protect tuna stocks and empower small-scale fisheries. For more information please go to Home – IPNLF

In terms of research, our team participates in ongoing sustainability reviews and audits, including involvement in SEDEX and SMETA frameworks to help ensure ethical sourcing and environmental responsibility.

How can I check expiry date on canned tuna?

Sirena canned tuna doesn’t display a best before date, as it has a long shelf life when stored correctly. According to Australian and New Zealand Food Standards*, products with a shelf life over two years aren’t required to show one.

As long as the can is undamaged and stored in a cool, dry place, the tuna should remain safe to eat. Once opened, if it looks or smells off, please discard it.