How to Keep Crawfish Alive? – Ways to Care and Store Them

The first time I saw crawfish was summer and hot in Louisiana. It was a festive seafood boil. Friends and family gathered around the pot while waiting for it to be opened. The beady eyes and tiny claws of those little crustaceans sparked my curiosity. Their bright red color intrigued me, indicating their movement from the water to the platter. However, more than their yummy meals that I could quickly try for myself, I realized catching them alive and keeping your crawfish healthy was crucial before cooking. In this blog, I have mentioned the things I have learned about, ensuring you know how to get fresh crawfish as possible.

Handling Crawfish with Care

Handling Crawfish with Care

First, you might be excited to finally get your hands on a sack of live crawfish and want to start cooking it already. However, tending to them correctly can mean a meaningful difference in flavor and juiciness. Live crawfish is the best thing since, well, you know alive. Be careful to keep them this way too! The trek from water to home is trying on them, so it is essential to nettle the additional stress and give them a suitable environment.

How Long Do Crawfish Live?

Crawfish have a pretty interesting lifespan. In the wild, they can live up to about 2-3 years if they’re not caught or eaten by predators, which is impressive for such a small creature. But when you’re keeping them at home or buying them live from a market, it’s a whole different story. Once they’re out of their natural habitat, crawfish generally won’t last more than a few days, even with the best care. I usually try to cook them within 24 hours, just to ensure they’re fresh and flavorful.

It’s worth noting that their lifespan shortens significantly if they’re kept out of water or in poor conditions. Crawfish are quite sensitive, and they can get stressed easily when they’re out of their usual environment. So, if you’re planning a crawfish boil, it’s best to buy them as close to cooking time as possible to avoid any unfortunate losses.

How To Store Live Crawfish?

Before we get into how to habitat, the initial step in keeping crawfish alive is finding a suitable container. Either a big cooler with holes drilled in the bottom or some clear plastic storage boxes like Tenga Snakes. The trick is to ensure the crawfish are not in standing water, which can get muddy and spoil quickly. Raising one side of the container allows you to ensure there is drainage while keeping the crawfish wet without drowning them.

Ideal Temperature

Temperature control is another critical factor in keeping your crawfish alive.  Cool, damp environments like swamps and rivers are ideal for them to flourish. It would help if you ideally stored them at a temperature range from 45-50°F (7-10°C). I usually put ice packs around the container but do not touch them, and I am less direct with crawfish. Use a layer of newspaper or cloth to keep the crawfish from coming into direct contact with the ice. Check your ice packs frequently and change them to ensure the temperature remains stable.

Ensuring Proper Hydration

If you want the crawfish moist but cool, spray with a bit of water every few hours. This provides the same environment they live in, improving their air quality. But do not use chlorinated tap water. Alternatively, if you have no alternatives except tap water, age it for at least 24 hours or use a de-chlorinator to eliminate chlorine.

How to keep crawfish alive

Although some may believe you should not feed crawfish, feeding will keep them alive longer. A diet that includes cornmeal or whatever other vegetable scraps you have will keep it going. So, I’ve discovered that feeding helps keep them active and alive, though not overfeeding. Remove any leftover food from the tank in a few hours before it gets rotten and has bacteria on it.

Watching and Keeping Crawfish Alive

Watching and Keeping Crawfish Alive

One of the funniest parts about keeping crawfish alive is having them living so you can see how they behave. Live crawfish are active and will react to touch. If you start to see some go lethargic or die, get those dead clams out of there. If there are any dead crawfish, it can also get spoiled in a shorter time and ruin the rest. It is also a time to see how your container is doing and make any adjustments if you need to.

Do You Have to Cook Crawfish Alive?

Yes, it’s usually best to cook crawfish while they’re alive to ensure freshness and safety. I know it might seem a bit intense, but cooking live crawfish ensures that any bacteria are killed, and you end up with the freshest, safest meat. When crawfish die, their bodies can start to break down quickly, which can affect both the texture and taste of the meat. So, for the best experience, I always try to cook them soon after bringing them home.

If you’re squeamish about it, I totally get it! The idea of cooking live seafood can be off-putting. But trust me, the result is worth it – you’ll get that deliciously tender meat that makes all the difference in a crawfish boil.

How Long Can Crawfish Live Out of Water?

Crawfish are definitely not land-dwellers, so keeping them out of water for too long can be risky. They can survive out of water for a few hours if kept cool and moist, but their gills need moisture to function. When I’m handling live crawfish, I try to avoid keeping them out of water or out of a cool, damp place for longer than necessary.

For best results, I keep them in a cooler with damp towels or newspaper on top, making sure they’re out of direct sunlight. This way, they can stay alive until I’m ready to cook them. But honestly, I’ve found that the fresher they are, the better they taste, so I always aim to cook them as soon as possible after bringing them home.

Can Crawfish Survive Out of Water?

It might surprise you, but crawfish can actually survive out of water for short periods if the conditions are right. They’re used to living in burrows and muddy areas, so as long as they’re kept moist, they can survive a few hours without being fully submerged. When I buy live crawfish, I usually put them in a cooler with some damp newspaper on top to keep them from drying out.

However, they’re not like fish – they can’t live long without some level of water exposure. If you’re planning to keep them for more than a few hours, it’s best to put them in a container with just enough water to keep their gills moist but not so much that they’re swimming around. It’s a delicate balance, but it can help keep them alive until you’re ready to cook.

How to Keep Crawfish Alive for 3 Days?

If you’re trying to keep crawfish alive for a few days, you’ll need to create an environment that mimics their natural habitat as closely as possible. I usually place them in a large cooler with the lid slightly open to let air in and keep the temperature cool – around 40-45°F works best. I layer the bottom of the cooler with damp newspaper and add ice packs on the sides, making sure they’re wrapped to avoid direct contact with the crawfish.

Each day, I rinse them gently with cool water to keep them hydrated and remove any that may not have survived. Just remember that the longer they’re stored, the more stress they endure, so they may not be as lively by the third day. But if you follow these steps, you’ll have the best chance of keeping them fresh and alive until you’re ready to cook!

Can You Freeze Live Crawfish?

Freezing live crawfish is one of those things that sounds good in theory, but it doesn’t work out well in practice. When I first tried it, I thought I could store live crawfish in the freezer for a later boil – but freezing them alive usually damages their texture and can make them mushy once thawed. If you absolutely need to freeze crawfish, I’d recommend cooking them first.

Once cooked, they can be frozen and later reheated without losing too much of their texture. I like to freeze them in a vacuum-sealed bag or airtight container to prevent freezer burn. So while it’s possible, it’s definitely better to cook them before freezing if you want to enjoy that fresh, tender taste later.

What to Feed Crawfish?

If you’ve got live crawfish at home, either for a short-term hold or even as a pet, you might be wondering what they like to eat. In the wild, crawfish are scavengers and will munch on just about anything they can find, from plant matter to small insects. For a quick stay at home, you can offer them small pieces of vegetables like carrots, spinach, or peas. I like to give them a mix to make sure they’re getting a bit of variety – and they seem to love it.

If you’re looking to keep them a little longer, some people even buy sinking fish pellets from pet stores, which are designed to give them balanced nutrients. Just make sure not to overfeed, as leftover food can spoil and harm the water quality. Keeping them fed can help reduce stress and keep them lively for when it’s time to cook.

How to Prepare Crawfish for Cooking?

When your crawfish boil is approaching, give those mudbugs one more rinse. This will wipe off any possible dust and help them cook. I like to put them in a massive tub of cool water and then swish the crawfish around gently. This should be done before cooking so they can stay in their comfort zone.

Unfortunately, sometimes, even with the best care, a situation can take an unexpected turn. If you see many of them going limp or dying, it is essential to troubleshoot as soon as possible. Now let’s look into the temperature requirements. Crawfish will be stressed or die if the water is too warm but can go dormant below certain temperatures. Reposition your ice packs as needed if you sense any cell ripening, and ensure that the drainage is operational so stagnant water does not form. This may also lead to less oxygen available, especially if the container is overcrowded. If so, divide the crawfish between more containers so they all have space and air.

How to Warm Up Crawfish?

Warming up crawfish can be a bit of a challenge, especially if you want to keep them juicy and full of flavor. I’ve tried a few different methods, but my go-to is to use a steamer. Just bring a little water to a simmer in a pot, then place the crawfish in a steaming basket. Cover and steam for about 5-10 minutes. This helps warm them up without drying them out, and they keep that nice, tender texture we all love.

If you don’t have a steamer, you can also wrap them in foil with a splash of water and put them in the oven on a low heat (around 275°F) for about 10 minutes. Be careful not to overdo it, though; crawfish can get rubbery if they’re reheated too long. With a gentle reheat, you’ll get close to that fresh-cooked taste again.

The Importance of Timing

Timing is everything for a successful crawfish boil. As much as keeping crawfish alive and healthy is essential, timing when to cook them is just as valuable. The flavor of crawfish deteriorates quickly with time, so try to cook them the same day or at most one or two days after purchase. If it is a significant event, get your supplier lined out and try to receive as close to the cooking time as possible. This will give you the best taste and reduce your efforts to keep them alive as long as possible.

The Joy of Crawfish Boils

The Joy of Crawfish Boils

For me, one of the true pleasures in dealing with crawfish is to share the moment you prepare and cook this seafood. Crawfish boils are served with more than food- they go down as a festival. People tell stories and laugh while eating or hold contests to see who can peel the fastest. Nothing is more rewarding than seeing friends and family dive into a boil and realize all their hard work was worth it because those little crawfish are delicious. If you’re preparing for just a couple of friends over or cooking up several sacks, the effort to maintain that freshness will reflect in every scrumptious crack and slurp.

How Long Can You Keep Crawfish in the Fridge?

If you want to keep live crawfish fresh before cooking, you can keep them in the fridge for a couple of days. I usually keep them in a cooler or the crisper drawer, ensuring they’re damp but not submerged in water. They’ll last about 1-2 days this way, but the sooner you can cook them, the better the quality.

Cooked crawfish can be stored in a tightly sealed container in the fridge for 3-4 days. To reheat, I recommend steaming them briefly to avoid drying them out. If you can’t get to them within those few days, they also freeze well. Just remember, fresher is always better when it comes to seafood, so I try not to let them sit too long!

How Long Can Cooked Crawfish Stay Out?

Cooked crawfish shouldn’t sit out for more than two hours. I’ve learned that leaving them out longer can lead to bacterial growth, which can make you sick. Suppose I’m having a crawfish boil or party. In that case, I usually make sure to either refrigerate leftovers quickly or keep the serving tray over ice to maintain freshness if they’ll be out for a bit longer.

For outdoor events in warm weather, I aim to eat them quickly or keep them in a cooler. This way, you don’t have to worry about freshness, and it’s much safer. I’ve found that by managing the timing right, you can enjoy them without any issues, and they stay just as delicious and safe to eat.

Is Crawfish Healthy?

When you think about indulging in a crawfish feast, you might wonder, “Is it really healthy?” Let me tell you, I’ve done the research because I love this little seafood treat myself! Crawfish is actually quite nutritious. It’s packed with protein but low in fat, making it a great source of lean protein if you’re looking to keep things light but satisfying. Plus, it has loads of essential minerals like zinc, iron, and magnesium, which help boost energy levels and support immune health. The best part? You don’t have to feel guilty going for seconds (or thirds!) since crawfish is relatively low in calories.

Another reason I love crawfish is because it’s rich in B vitamins, especially B12, which is crucial for nerve health and overall energy. Some folks worry about cholesterol levels in shellfish, and it’s true, crawfish has some cholesterol. But eaten in moderation, it can still fit into a heart-healthy diet. I like to balance it with plenty of veggies and maybe skip some of the heavier butter dips to keep things in check.

How Long Are Crawfish Good For?

How Long Are Crawfish Good For

Once you have cooked crawfish, they’re good for up to 3-4 days in the fridge, but the fresher you enjoy them, the better the taste. I usually make sure to store leftovers in an airtight container in the refrigerator to keep them fresh. Personally, I find that they’re at their best within the first two days after cooking – that’s when the flavors are still vibrant, and the texture is perfect.

If you’re anything like me and crave that just-cooked taste, reheating them gently (maybe with a splash of water to add moisture) can help bring back some of that fresh flavor. For long-term storage, you could freeze them, but keep in mind that freezing changes the texture a bit. However, if done right, frozen crawfish can last for several months and still be a tasty addition to future meals.

Fresh Crawfish Boil Experience 

It feels mighty good to serve a dish that you have nurtured all the way through. I love getting together with friends and family to boil a bunch of crawfish. I take great pride in knowing that my hard work has given me the freshest mudbugs possible. Again, it’s a small thing, but its impact on flavor and overall meal enjoyment cannot be underestimated.

Keeping those crawfish living and kicking is part of preserving their flavor, but it also honors the food we love and all the friendship & family bonds that come with them. Take some time to pull it off correctly, so your next crawfish boil is the best. Whether you are a seasoned pro or this is your first time with the seafood, I hope my blog helps everyone keep their crawfish  fresh and lively, awaiting hot round-up in the boiling pot. You can also check my previous blog on cooking fish sticks, how long to cook fish sticks in air fryer, which I published recently.

Blogger and creative entrepreneur, former marketer and strategist. I’m devoted to helping women boost their impact, master their money, and better themselves so that they can unlock their most meaningful lives. Proud Canadian hailing from Toronto, ON.