Why Does My Hermit Crab Look White? (New 2022)

The marine species of hermit crabs, which range in color from bright yellow, blue, and scarlet, are beautiful to reef aquarium keepers, and they are often chosen for their appearance and foraging habits. Of course, a white hermit crab shell would raise the alarm in the minds of most owners, but fortunately, this is not too serious and can be easily remedied.

For those who don’t know, hermies don’t have a shell of their own, and so they spend their time acquiring and moving into discarded shells of other animals, like sea snails. The calcium bicarbonate content of snail shells is naturally high, so any decrease in this level will cause the surfaces to fade and eventually turn white. The discoloration of the hermie shell may be caused by excessive salt exposure. Your hermit crab will likely hop from body to shell regularly and may choose a more colorful shot for its next home. It is a natural occurrence for snail shells that have been submerged in the ocean for an extended period or washed up on the beach by waves.

When the shell of your hermit crab starts to turn white in a reef tank, it is a different story and indicates that your crab is lacking calcium and magnesium in sufficient amounts. Hermes, like humans, are omnivores and require a varied diet that includes meat, fish, fruits, and vegetables to be healthy. Cuttlebone and sea biscuits are good sources of calcium for hermies, so owners need to supplement their pets’ diets with these foods. Commercially made hermie food, which includes calcium and magnesium, can be found in the bird food section of most good pet stores. It can be grated and added to the pet’s food.

The crab’s exoskeleton, which contains many nutrients, is usually consumed during molting, but occasionally a portion of it is discarded and floated to the surface. In many cases, new owners have mistaken this discarded skin for their beloved hermie’s white shells and have feared that their beloved hermie has died. In reality, he’s probably resting comfortably inside the snail shell after its recent molt.

The color of your hermit crab’s shell should no longer concern you. Even though he is a picky creature, his quest for the perfect house, no matter what color it is, often leads him to fight to the death. Hermit crab shells turning white isn’t a big deal and can be controlled with calcium-rich foods, so relax and enjoy your new friends.

As we talked about, hermit crabs should have a lot of colors. Each species has its unique markings, so there isn’t a single color you need. So, that who looks pale are more likely to be sick.

If your hermit crab looks slightly different, it doesn’t mean it’s sick or dying. It may just need a few changes in the environment to get back to its standard color. The hermit crab’s shell turns white, not its skin. However, these are the main reasons why hermit crabs turn white:

Weave and Tear

When hermit crabs move around, they take their shell with them. It can cause the body to get worn and scratched because it bumps around in the tank. After a while, the shell’s polished finish can be worn away by abrasive sand. It means that the body starts to change color after a time, and it often looks like it turns white.

Calcium Bicarbonate

Owners need to give their hermit crabs shells in different shapes and sizes, so they can move into them when they get too big for their old bodies. Please make sure they are clean before you put them in the water. Boil them in salty water before you do this. These shells are made of calcium bicarbonate, so this process makes them look like they’ve been bleached and turned white.

The chemical reaction

Should clean The empty shells before you put them in the hermit crab tank for them to use. It would help if you boiled them in salty water to do this. While this can happen during this process, the shells start to turn white (whiten). Covers are mostly made of calcium, so boiling them in water turns them blue.

It can also happen in shells if you put moss or coco fiber in the enclosure because these have a lower pH than the shell. It also causes the color to change.


It could be that the crab is shedding its old skin. It will molt many times as it grows, and during this process, it may look a little different than usual.

Exoskeletons are shed during this process. As the old exoskeleton separates from its body, it may look ashy-white as it fades away. Crab eyes might also look cloudy and milky.

People who get hermit crabs for the first time might be worried about this color change, but the truth is that it is normal and not a big deal.

In the molting process, many hermit crabs hide in the sand. Most owners don’t even notice that their color has changed. Even though your crab is molting on the surface, make sure it is safe. If you have more than one crab in the tank, make sure it isn’t going to get hurt. Then cut a two-liter soda bottle in half and put the cut end over a crab and into the sand. Ensure the bottle lid is off so your crab can get some air. In this way, the crab will be able to fully shed its exoskeleton while also giving the new one time to harden enough.

Why Is My Hermit Crab White After Molting?

White color will appear on your hermit crab when it molts. People don’t have to worry about this at all. When hermit crabs molt, they grow bigger and heavier each time. The Journal of Experimental Marine Biology and Ecology talks about how this happens. They lose several times in the first three years of their lives.

When the hermit crab goes through this process, it will eliminate its exoskeleton and make a bigger one to fit its growing body. They will not move very much while molting because it is a private thing for them to do. Owners often worry that their hermit crab is dead or dying because of this.

Many weeks, or even months, pass before the animal sheds its skin. Keep your hermit crab alone during this process, or it could have trouble. For hermit crabs to molt, they:

Substrate: They sink into it.
Dig more often, like they’re building a tunnel.
Hang out of their shells.
To store fat and water, you need to eat and drink more than you usually do.
They get a glassy or glazed look in their eyes.
The color of a hermit crab will change when it is done with its molting process and emerges. It is how you’ll know that your hermit crab is back to normal, and this is how you can tell.

What Is the Fuzzy White Stuff on My Hermit Crab?

Many hermit crab tanks have white mold, which may surprise you. It can also make their shells look a little white or pale. Fortunately, mold is a normal part of any tank, and it doesn’t cause any significant health problems. If you see it in the tank, you should clean it up yourself to keep things clean.

In most cases, mold comes from the old substrate. It can also be caused by a lack of airflow in the tank. For your hermit crabs to get enough moisture, you have to ensure the tank is sealed so that it doesn’t get too dry. Food can also go wrong if left in the tank for too long.

Once mold grows, you’ll always have mold spores, so keep an eye on the tank and your hermit crab’s shells to ensure it doesn’t get out of hand. When you have mold, it’s likely to come back often.

If your hermit crab turns white, there’s nothing to worry about most of the time. If your hermit crab behaves in a certain way, it is likely molting. However, always keep an eye on your pet and ensure the environment is always clean and safe.

Why is my Hermit Crab going dark?

It changes in color when they are going to molt, and you can also see the marks on their bodies. There is a change in the shade of hermie. Another thing that could be going on is that hermit crabs don’t get enough nutrients, making them look a different color.

They show that they are dying.

They are dead if you see them out of the shell, and they have a foul or smelly odor. It is also a sign that hermit crabs are dying because of their pale color. If your body smells salty and rotten, it will break.

It’s difficult to describe the appearance of dying hermit crabs.
There must be a reason why my hermit crab has lost its color. You should be very careful when you look at the shell to see if there is a hermit crab inside. It is dead as long as the hermit crab’s body hangs out of its surface and a foul smell is coming from it. There are times when the hermit crab changes its shell into a new one when there isn’t any movement around.

They should be a specific color for healthy hermit crabs, like blue or green.
Hermit crabs are healthy if they have a lot of colors, not just a lot of white. The color of the hermit crab can’t tell us if it’s healthy or not. Some species are white or pale, and they are also good for you. The pale color that most species have can only be seen when they are about to molt.

When a Hermit Crab turns white, what does that mean?

If they don’t move, then they are dead. Also, when molt, change color. Due to the change in an exoskeleton, this is why

When too much calcium and salt are used, it turns white and pale. But if the color is white and there is no movement, it signifies death.

Why Is My Hermit Crab Getting Different Colors?

Because of its color, you can figure out what kind of hermit crab it is. You don’t have to worry about the shell color because it will change when the shell is changed. Even though the birds’ colors vary when they are ready to molt, Once they’re old enough, they stay the same color, so you can tell which kind of fish you have.

Most Beautiful Reef Safe Fish

If you are looking for some of the most beautiful reef-safe fish to add to your saltwater aquarium, look no further. The Blue Hippo Tang is one of the most colorful, peaceful, and well-known marine fish. The Blue Hippo is a ruffly, round, royal blue-colored fish with bright yellowtail. Generally, this species gets along with other aquarium fish, but some varieties may become aggressive towards other creatures if placed in small tanks.

If you are on a budget, consider a Mandarin fish. They’re beautiful, and they were not very expensive. They require a large tank with plenty of space to swim and hide. While they’re not reef-safe, they do well in fish-only or live rock aquariums. If you’re looking for something more exotic, consider a Watchman Goby. These burrowers can live in a 20-gallon tank or larger, and they are compatible with other species of their species.

You might consider buying a smaller tank if you have a too-small tank for a Blue Hippo Tang. This active, colorful fish can reach 12 inches in length. It thrives in tanks that are at least 100 gallons in size. They’re also delicate, so a quarantine tank is essential to prevent disease. A smaller, more sensitive aquarium may not be the best option for this species.

Reef Tank Snails

Snails are an essential part of any reef tank, but not all species are suitable for use in coral reef tanks. There are many different types of saltwater snails, each working in different situations. Some prefer the sand, while others prefer to roam around the tank. Either way, these animals are excellent reef cleanup crews. Snails work together to clean the aquarium and are very peaceful.

A common type of saltwater aquarium snail is the Astrea, native to the Caribbean. Their beige shell is textured, and their characteristic rummaging behavior makes them excellent algae cleaners. The Astrea measures 1 – 6 cm in length and is a popular choice for a saltwater aquarium. You can keep as many as four or five of them at once. During the first few months of keeping these creatures in your reef tank, they will start to lodge themselves in crevices.

Nassarius snails are very common in saltwater aquariums. They live in large numbers and can be kept in many tanks. They come out to eat food and are entertaining to watch. They are also excellent tank cleaners. Their shallow digging habit makes the substrate easier to aerate, and they control the levels of nitrites and ammonia. If you’re wondering which type of snail is the best choice for your reef tank, this is the perfect snail!

The Salty Crab

There’s no better place to watch dolphins than at The Salty Crab on the Gulf of Mexico. Several seating options available, including a bar, are the perfect place to relax and enjoy a drink. Plus, it’s located on the beach, making it one of the best places to watch the sunset. If you’re looking for a fantastic meal, don’t miss the delicious appetizers and mouthwatering seafood.

It’s a great place to watch dolphins.

The salty crab offers an excellent breakfast and daily specials. There’s also live music. However, there’s no parking lot on-site, so you’ll have to park in one nearby public lot. If you’re lucky, you’ll spot a dolphin! And if you’re not fortunate enough to see one, the salty crab is an excellent place to watch them swim by.

It’s a great place to relax.

If you want to enjoy a waterfront dinner, then The Salty Crab Bar and Grill is the perfect location. This restaurant is located right on the beach, near the Fort Myers Beach Fishing Pier. The dining room has a laid-back, relaxed atmosphere. The food is excellent, and the drinks are cold. The menu frequently changes, so it’s good to check out the menu before going.

It’s a great place to grab a cold beer.

If you love seafood and a cold beer, you’ll love the Salty Crab Bar and Grill. Located directly on Fort Myers Beach, the restaurant offers breakfast, lunch, and dinner all day. Enjoy live music almost every day and a great menu while watching the sunset over the Gulf of Mexico. You’ll find it hard to resist this restaurant’s delicious menu and convenient location.

This former Pizza Hut has turned into a cozy, inviting open-air bar. You’ll find rope swings in the backyard, making it perfect for late-summer drinks. The menu features local seafood and pub classics. The service is warm and friendly, with the waitstaff greeting regulars by name. The menu is updated regularly to include the freshest catch of the day and the freshest ingredients.


Having a hermit crab turn white may be a big deal if you’re new and don’t know what to do, but it’s usually not. A lot of the time, the shell is changing color, not the crab. It can be because of wear and tear or because the body was boiled in water (especially salt water) before being put in the tank for the crab to use.

Because hermit crabs can get sick, I think you should get professional help from a vet in your area.

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People also ask - FAQ

In this case, hermit crabs don't make their shells. Instead, they move into the empty ones. Bodies break down as they move. To explain: That's why their pointy ends have turned white. As the hermit crabs get bigger, they need many different shells to move.

Look for crabs that lose their legs, run around without a shell, or don't hide in their bodies. It is what you should look for to see if your hermit crab is sick:

Then, you'll also see that their body is a little bit outside of their shell. During molting, this is also common, but if you look close enough, you might see signs of movement, like twitching. It is because the crab is moving. A foul smell and no movement are signs that your crab is dead. You can try to look closer and see if your crab moves at all.

It means that the hermit crabs will be a dark and bright color. They have a white shell, but they should have bright and shiny flesh to cover them. The more pale a hermit crab is, the more likely it will be sick. The fact that a hermit crab is pale does not mean it is ill or dying.

Too much CO2 can make their shells erode and turn white (too high of a carbonic acid level). In addition, too much potassium can also make it hard for your body to take in calcium. Even if you have calcium, if you have high potassium and high CO2, adding more calcium won't do much good.

Molting. If you have a hermit crab, he doesn't look good when he's about to molt. In most hermit crabs, they turn gray or beige as they get bigger. To finish their molting, they often dig into the ground. When they emerge, be ready for their natural colors' clean, fresh look.

There are ways to tell if your hermit crab is stressed or not. The limbs are cut off. Hidden all the time, whether in the shell or buried under the ground. People who don't eat or drink or don't bathe. It doesn't matter if the aggression is directed at tankmates or owners. They kept climbing the walls as if they were trying to get out of the tank.

It is true whether it's due to a molt or something else in the environment. When the hermit crab is out of its shell, it's very stressed and at risk. Your crab needs to be protected from the other crabs in its habitat, as well as a bit of coaxing to get it to come back to its shell when it gets tired.

The shell of a dead crab will become rigid and loose. If you shake the body, the crab will fall out. It is how it works. If you think your hermit crab is dead, shake the shell to see if the crab comes out.

A molting crab looks dead and limp, and the body is often almost out of the shell. 1 When the hermit crab is molting, you might be able to see tiny twitches in its body. Otherwise, it can be hard to tell if the crab is still alive, so you need to be very careful when you look.

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