Maximus Gage
Mussels are a tasty treat, but it's important to know where to catch them to ensure they are safe to eat. Mussels are sedentary filter feeders, meaning they can absorb toxic substances from the water. They are often found in the impact zone, where waves crash against rocks, and are best harvested during a low spring tide. They can be identified by their dark blue, black, or brown shells, and you should always check that they are alive by ensuring their shells are tightly shut when exposed to air. Before heading out, it's important to check regulations and safety closures for the area, and to confirm that there are no bans on collecting mussels due to pollution. Once harvested, mussels can be stored in a cool box or bucket of water and later cooked in a variety of ways, including steaming, smoking, or frying with garlic, onions, and tomatoes.
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What You'll Learn
Check for pollution and toxicity
Mussels are commonly found along coastlines, in the "impact zone", where waves crash against rocks. They are often found clinging to rocks, using threads called "byssus" and a type of natural superglue. They are filter feeders, feeding on algae, bacteria, and other aquatic life by pumping water through their gills.
Due to their feeding mechanism, mussels can absorb toxic substances, including pollutants like ammonia and nitrates, common chemicals that contaminate waterways. They are also sensitive to pesticides, hydrocarbons, metals, and other contaminants. As a result, mussels have been used as biosentinels or indicators of pollution in aquatic environments.
Before consuming mussels, it is essential to take certain precautions to ensure they are safe to eat. Here are some steps to check for pollution and toxicity:
- Harvest mussels from pristine areas, away from farms or residential areas where toxic runoff may occur.
- Check with local authorities, such as the Fish & Wildlife department, to ensure there is no harmful algae or other contaminants in the water.
- Avoid harvesting during warmer months (May through October in California, for example) as mussels are more likely to harbour toxins during this period due to spawning.
- Inspect the mussels for any signs of damage or unusual behaviour. Discard any mussels with cracked shells or those that remain open or start to open when exposed to air, as this indicates they are not alive and well.
- Clean the mussels by removing debris and rubbing off the "beard", a small hairy spot where the two shell parts connect.
- Soak the mussels in clean saltwater (35g of salt dissolved per litre of water) for 8-10 hours to remove grit and impurities.
- Cook the mussels thoroughly. Discard any mussels that fail to open during cooking, as these were likely dead before cooking and are unsafe to eat.
By following these steps, you can minimise the risk of consuming contaminated mussels and enjoy a delicious meal. Mussels that are healthy and properly prepared are succulent, tender, and flavourful.
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Look for them during low tide
Mussels are a tasty treat and can be found in abundance along coastlines. They are usually found clumped together on wave-washed rocks, attaching themselves to the rock using threads called "byssus" and a sort of natural superglue.
To catch mussels, it is best to look for them during low tide. Mussels can be found in the inter-tidal zone where waves break on the land, partially submerged depending on the tide. During low tide, you will have better access to the mussels and there is less danger of slipping on submerged surfaces. You can find mussels on exposed rock faces, often in large swaths, so you will have plenty to harvest.
When harvesting mussels, it is important to be cautious and watch how the water is moving around you. The lower the tide, the more options you will have and the less concern there will be about getting wet or knocked around on the rocks. Aim for a negative tide if possible, and always follow the rules and regulations for mussel harvesting in your area. Be sure to spread out your harvest and don't take so many that you create bald spots in the mussel bed.
To harvest mussels, wear gloves and use a twisting motion to pull them off the rocks. Then, pull the "beard" off the bottom, the hairs that previously anchored the mussel to the rock. It can be tricky to remove mussels from the rocks due to their threads and glue, so a practiced technique is required.
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Find them on rocks in the 'impact zone'
Mussels are commonly found on rocks in the intertidal zone, which is the area between tide marks that is above the waterline during low tide and underwater during high tide. This zone is home to various organisms, including starfish, sea urchins, and seaweed such as kelp.
Blue mussels, in particular, are known to "hang on" to rocky shores by using byssal threads, which are strong, silky fibres produced by byssus glands in their feet. These threads allow them to attach to rocks, pilings, and other hard substrates. However, due to ocean acidification, the byssal threads of blue mussels are becoming weaker, making it more difficult for them to adhere to rocks and other surfaces.
The impact zone for mussels refers to the area where waves crash against the rocks. This zone can be identified by the presence of boulders tinged with a dusky blue colour from snapped-closed mussels. The constant crashing of waves can dislodge mussels from their rocks, and the weakened ability of their byssal threads due to ocean acidification can further contribute to their detachment.
When mussels are dislodged from their rocks in the impact zone, it can have ecological consequences. Mussels are considered important species on rocky shores, and their presence or absence can significantly influence the surrounding ecosystem. Additionally, the economic implications can be significant, especially considering the global blue mussel aquaculture industry, valued at US$1.5 billion annually.
Therefore, finding mussels on rocks in the impact zone involves understanding the intertidal zone and the challenges mussels face due to ocean acidification. The impact zone is a dynamic environment where mussels must adapt to the forces of crashing waves while also coping with the weakening of their adhesive abilities.
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Identify mussels by their appearance
Mussels are relatively easy to identify, but there are some key things to look out for when identifying them by appearance. Firstly, it is important to distinguish between wild mussels and freshwater mussels, as they can differ in appearance. Shell shape is among the most useful external features for identification. The shape of a mussel shell can vary, with some species having long, elliptical or "narrow" shapes, and others being rhomboidal or "rounder". For example, the species Leptodea ochracea has a rhomboidal shape, whereas L. cariosa and L. radiata have an ovoid form that is modified by a distinct "flattening" of the posterior shell margin.
Another key feature to look out for is the presence of growth lines on the shell. In temperate latitudes, such as the New York Metro Area, growth lines are laid down annually, so you can approximate the age of a mussel by counting the number of complete growth lines. Additionally, the appearance of the shell can give you an indication of whether a mussel is safe to eat. Fresh mussels should have tightly closed shells, and if the shells are open or broken, it is a sign that they are not fresh and should be avoided. Furthermore, if a mussel is closed but does not open when tapped, it is likely dead and should be discarded.
Mussels can also be identified by their colour. Fresh mussels should have a healthy appearance, and any that appear discoloured or slimy should be avoided as they may be contaminated with harmful bacteria. Wild mussels, in particular, may host the parasitic Pea Crab, which has little dots for eyes. Finally, the smell of a mussel can indicate whether it is safe to eat. Fresh mussels should have a sweet, ocean-like smell, and any sour, fishy, or ammonia-like odours indicate that the mussel has gone bad.
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Prepare mussels for cooking
Mussels are plentiful along coastlines, often found in the "impact zone", where waves crash against the rocks. It is important to check the tides and ensure it is low tide when harvesting mussels. It is also crucial to stay away from farms or residential areas to avoid toxic run-off. When collecting mussels, gently remove them from the rocks, as they are held together by threads and a type of natural superglue.
Once you have collected your mussels, it is essential to prepare them properly for cooking to ensure they are grit and impurity-free. Firstly, discard any mussels with cracked shells or those that remain open after tapping them on a surface. Next, remove the beard, a small hairy spot where the two parts of the shell connect, using your hands or scissors. This step should be done just before cooking. If you are not cooking the mussels immediately, place them in the coldest part of your refrigerator on a bed of ice with a damp cloth on top. Mussels will stay fresh for up to three days.
There are differing opinions on whether to soak mussels before cooking. Some sources recommend rinsing them under running water and checking for dead mussels, while others suggest a more thorough soaking process. If you choose to soak your mussels, fill a bowl with cold water, add salt, and optionally, about 1/4 cup of flour. Soak the mussels for about an hour, agitating them gently with your hands to remove any debris. During this process, mussels filter water in and out of their shells, expelling sand or grit.
After soaking, rinse the mussels under cold running water. Some sources recommend an additional step of scrubbing the shells with a stiff brush before cooking. When cooking, steam the mussels for about 15 minutes. They are ready to eat when they have all opened up. Any mussels that remain closed after cooking are dead and should be discarded.
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