Some good food choices to offer your pet crab are:
- Commercial crab food
- Bloodworms
- Cooked vegetables
- Small, brined fish
- Flies
Fiddler crabs live rather brief lives of no more than two years (up to three years in captivity). Male fiddler crabs use the major claw to perform a waving display as a form of female courtship. Females choose their mate based on claw size and also quality of the waving display.
What eats crabs other than humans?
That is why it is very important to understand that they need to have a varied diet of:
- Vegetables and Fruits
- Protein
- Calcium
What do crabs eat and how to feed them?
- There are several types of wood for their enjoyment, like Birch, Oak, Ash, or Cholla, to name a few.
- Your crab is a little creature, so there is no need to feed them multiple times a day. ...
- Foods like wood will last considerably longer, so change the wood when you see it gets slimy, old, or otherwise unappetizing.
Is a crab a good pet?
- Active scavenging
- Healthy appearance
- Bright, even coloring
- Sociable
- Molting
What is a hermit crabs favorite food?
- crackers (no or low salt)
- unsweetened cereals
- plain rice cakes
- popcorn (plain, air popped, can be given occasionally)
- cooked eggs, meats and seafood (in moderation)
- freeze dried shrimp and plankton (found in the fish food section at the pet store)
- brine shrimp
- fish food flakes

What do pet crab eat?
Crabs are true omnivores that will eat practically anything....Try offering crab claw-sized bits of foods like the following:Frozen shrimp and plankton from the pet supply store.Dry or fresh seaweed.Lettuce, zucchini, apples, and potatoes.Raw fish.Hermit crab food pellets.Fish food flakes.Dry dog or cat food.
What can I feed a crab at home?
A well-balanced hermit crab diet includes:High-quality, commercially available hermit crab food every day.Vegetables (like spinach, carrots, kale and romaine lettuce) and non-citrus fruits (like mangoes, coconut and papaya) in smaller amounts.Nuts, seaweed, brine shrimp and fish flakes as treats.More items...
How do you keep a pet crab alive?
Furnish the habitat with at least 3-5 larger empty seashells per crab, to use as future housing. As they grow into these shells, add slightly bigger ones. Add a shallow dish with fresh water and marine-grade saltwater for your crab to soak in. Make sure it is dechlorinated water, chlorine is harmful to crabs.
What can you feed a wild crab?
Crabs are scavengers, eating pretty much everything and anything they can find in the wild environment. In the sea, crabs eat green and red algae, decaying matter, and carrion such as dead shrimp and fish.
What do tiny crabs eat?
Smaller crabs eat algae, seaweed, worms, small clams, and shrimp. Larger crabs can eat squid, snails, mussels, other crabs and small fish. Some species of crabs can eat hard foods like barnacles, starfish and even sand dollars.
What do small land crabs eat?
Land crabs prefer a diet of leaves, berries, flowers, grasses, and decaying plant material. Occasionally these crabs feed on insects, spiders, carrion, and feces. Land crabs typically do not stray far from their burrows to forage and often carry food in their claws back to their burrows to eat.
Can crabs live in a fish tank?
Overview. Found in bodies of freshwater, such as rivers and streams, in tropic and subtropic climates, crabs can be an interesting addition to the home aquarium or a species-only aquarium. These small and fascinating scavengers are also escape artists and capable of finding almost any hole in the hood of an aquarium.
How long do pet crabs live?
How long do crabs live in captivity? In captivity, all crab species survive for roughly three to four years on average. The longevity of hermit crabs is directly proportional to the level of care they receive. Unfortunately, most crabs in captivity only live for a few months.
Do crabs need air?
Crabs, like many sea-dwelling creatures, have gills that they use to extract oxygen from the water in order to breathe.
How often do crabs eat?
How Often and How Much Should You Feed Crabs? In general, most adult crab species do quite well on one feeding per two days. However, some owners prefer to feed them daily to prevent them from getting hungry and picking on tankmates.
What do small saltwater crabs eat?
Most crabs peruse the ocean floor, reefs, and rocks for food ranging from algae, organic matter, carcasses, and waste. Popular crab species for saltwater aquariums are chosen for their affinity for different waste that could clog up filters, cause algae to spread, or make tank water murky.
Do crabs eat snails?
Most crabs love to eat snails and other molluscs. For some crabs like the blue crab and Horseshoe crabs, snails, clams and other molluscs make up more around half of their diet. Hermit crabs often eat snails to take over their shell.
What is a freshwater crab?
Freshwater Crab. includes red claw crab, fiddler crab and Thai devil crab species. Small and fascinating scavengers, freshwater crabs are also escape artists capable of finding almost any hole in the hood of an aquarium.
How many crabs per square foot?
No more than one crab per square foot is recommended. Do not keep with fish that will harass or eat them, such as certain cichlids. May catch and eat small fish, dwarf African frogs and other tank mates that live or sleep on the bottom of the tank.
Do crabs climb out of water?
Keep in an appropriate size aquarium; a natural behavior of most crabs is to climb out of the water for brief periods of time, their habitat should Provide them the ability to climb out of the water.
Can crabs eat snails?
Active, nocturnal (active at night) scavengers; may eat snails. Crabs can climb almost any surface, including airline tubing and intake tubes; secure holes in aquarium hood to keep crabs inside. All crabs molt; a crab lying on its back may be molting. Crabs benefit from freshwater salt; follow package instructions.
What to feed hermit crabs?
Supplement your hermit crab's diet with fruits and leafy vegetables like kale. They take small bites and eat slowly, but any leftovers in the morning should be removed. Last, always make sure they always have fresh, clean, chlorine-free water. Socializing hermit crabs.
How do you keep hermit crabs clean?
Cleaning hermit crabs. Your crabs will clean themselves if they’re provided with a conditioned freshwater and saltwater bowl to bathe in. Keeping a sea sponge in the tank also helps them stay clean, as it increases the humidity in the enclosure. Normal molting behavior.
How to stop hermit crabs from being lonely?
Socializing hermit crabs. Hermit crabs are social creatures that like to live in large groups. Because of this, they can get lonely if left alone too long. One option to prevent loneliness is to get multiple crabs. If you do add one or more hermit crabs to an existing tank, keep an eye out for fighting. Continued.
Why do crabs leave their shells?
If a crab is stressed, it will become inactive , slow, and may leave its shell for a long period of time (without taking another one, like it does when molting). Hermit crabs can become stressed by bullying, extreme hot or cold temperatures, loneliness, or overcrowding.
Why do hermit crabs fight?
Continued. There are multiple reasons crabs might fight, including not having enough food, water, or space. Some hermit crabs are aggressive with others and may try to steal shells. Having spare shells in the aquarium can help prevent this type of bullying.
What do you need to know before getting a hermit crab?
Before You Get a Hermit Crab. It’s important that you have all the supplies to safely welcome home your new hermit crab. The most important elements are a secure, heated enclosure and food. But once you’ve got the basics, there are lots of ways to make the tank more visually appealing. Hermit crab housing.
What happens to hermit crabs after they molt?
After molting, your hermit crab will change into a new, larger shell. Be sure to have a few ready so they can choose the best fit. This process of growth, shedding skin, and changing shells, is a continuous and repeating process for hermit crabs. Signs of a health problem.
How to keep a crab's water clean?
7. Set up an aquarium filter or an aeration pump in the water. Pet crabs require aerated water in order to thrive. A plug-in aquarium filter will both aerate the water and help keep it clean. The other option, a plug-in aeration pump, does not filter the water.
How to keep fiddler crabs out of aquarium?
Make brackish water if you’re housing fiddler crabs. Add 2 US gal (7.6 L) of chlorine-free water to a clean bucket. Stir in 1 tsp (5 g) of marine salt, which is available at pet supply stores, until it dissolves. Use an aquarium hydrometer (also available at pet supply stores) to test the water.
How many crabs can you keep in a tank?
If you want to keep more than 4 crabs, add 3 US gal (11 L) to the tank size per additional crab—for example, a 16 US gal (61 L) (or larger) tank for 6 crabs.
How to make a sand aquarium?
2. Add 2 in (5.1 cm) of aquarium sand as substrate. Pour an even layer over the entire bottom of the tank. Use sand that’s specifically designed for aquariums, which you can find at any pet supply retailer. Aquarium sand is screened, cleaned, and sanitized in ways that other types of sand may not be. ...
How to clean a sand tank?
Skim the sandy surface with the scoop so that you pick up the very top layer of sand and any feces or food waste present. Shake the scoop lightly so that the sand falls through the slits or holes, then discard the waste. Clean the sand more frequently if the tank tends to develop an unpleasant odor during the week. ...
Can you pet a hermit crab?
While people typically buy hermit crabs —which aren’t technically crabs— as pets, actual saltwater or freshwater crabs can also make great companions. Pet crabs require a large tank that’s kept at the right temperature and partially filled with sand and either fresh or brackish (slightly salty) water.
What do you feed sand crabs?
Categories: Crabs. Article Summary X. To feed sand crabs, fill their tank with beach sand, which contains insects and microorganisms that crabs like to eat. Then, pour seawater over the sand a few times a day to provide your crabs with algae and plankton.
What do hermit crabs eat?
In the wild, hermit crabs have been known to eat leaves, fruit, and even wood. You can also buy commercial hermit crab food that mimics the crab's natural diet.
How to catch sand crabs?
In the wild, sand crabs bury themselves deep in wet sand and catch plankton with their antennae. Replicate this process by filling your crab's habitat with beach sand, then pouring seawater over the sand a few times each day. Use any glass aquarium.
How do sand crabs move?
Thus, a sand crab can gather several morsels from each receding wave. Most crabs can move in any direction—forward, backward and sideways—but a sand crab moves only backward. Thus, it must position itself carefully to reap its meals from the waves.
How many eggs do sand crabs produce?
A female may produce as many as 45,000 eggs. She carries them on her abdomen until the eggs hatch – about 30 days later. For two to four months, the larvae drift as plankton, and currents can carry them far across the sea. Sand crabs can reproduce during their first year of life if the water is warm enough.
Do sand crabs live in rhythm?
Sand crabs live in rhythm with the tides, and it can be difficult to replicate the delicate littoral ecosystem in which they thrive. Furthermore, sand crabs feed on such a diverse diet that you may have a hard time giving them the variety they're used to.
Can you keep sand crabs in an aquarium?
Sand crabs are saltwater creatures that need high temperatures to survive. Thus, they are very difficult to keep in aquariums. If you must keep a sand crab in an aquarium, your best bet may be to frequently replenish its tank with fresh, plankton-rich beach sand. Steps.
How To Choose A Pet Crab
With so many cool and different types of pet crabs to choose from, how will you ever decide which one to get? There are a few questions you will want to consider when selecting the perfect pet crab.
Caring For Your Pet Crab
As we already discussed, each type of pet crab has its own set of specific requirements for proper care. Before you bring your new crab home, be sure you have done your research and determined the right habitat and diet for your pet. Here are some general guidelines for the care and feeding of pet crabs.
Keeping Your Pet Crab Healthy
An important part of keeping your crab healthy is making sure you keep them in the right environment and feed them the right foods.
Conclusion
Pet crabs can make an enjoyable addition to your aquarium so long as you can provide the right conditions for them. With so many different types of pet crab to choose from, you are certain to find just the right one. Just make sure you stay one step ahead of these crafty climbers and block all their escape routes!

Overview
Typical Appearance and Behavior
- Active, nocturnal (active at night) scavengers; may eat snails
- Crabs can climb almost any surface, including airline tubing and intake tubes; secure holes in aquarium hood to keep crabs inside
- All crabs molt as they grow; a crab lying on their back may be molting. Some will feed on their old shell for calcium
- Active, nocturnal (active at night) scavengers; may eat snails
- Crabs can climb almost any surface, including airline tubing and intake tubes; secure holes in aquarium hood to keep crabs inside
- All crabs molt as they grow; a crab lying on their back may be molting. Some will feed on their old shell for calcium
- Some species of crabs live in low brackish levels and will benefit from freshwater salt
Habitat
- Habitat size
Keeping in an appropriate size aquarium of 5+ gallons is recommended for smaller-sized crabs. A larger aquarium is always recommended, as water conditions can change rapidly in smaller water volumes. - Building your habitat
A natural behavior of most crabs is to climb out of the water for brief periods of time; their habitat should provide them the ability to climb out of the water. Some species of freshwater crabs are more terrestrial (land-dwelling) and need a habitat mainly comprised of land with access to wate…
Feeding
- A well-balanced freshwater crab diet consists of: 1. Flakes, freeze-dried, sinking pellets and wafers or frozen food 2. Feed a variety of food to ensure complete nutrition Things to remember when feeding your crab: 1. Feed a small amount once daily 2. Make sure a small amount of food reaches the bottom of the tank; if unsure, drop sinking pellets i...
Freshwater Crab Care
- Maintaining great water quality with regular water changes and adequate filtration is important to help keep your freshwater crabs healthy 1. Daily: Check filter, water temperature and other equipment 2. Weekly: Test water quality at least once a week 3. Weekly to monthly: Change 10 to 25% of the total volume of water every two to four weeks or as needed. Change filter media mon…
Where to Buy Freshwater Crabs
- A variety of freshwater crabs are available for purchase at your localPetco Pet Care Center location. Please call ahead to check availability.
Supplies
Tank Mates
- No more than one crab per square foot is recommended. Male crabs can be very territorial Do not keep with fish who will harass or eat them, such as certain cichlids. May catch and eat small fish, dwarf African frogs, snails and other tank mates who live or sleep on the bottom of the tank Depending on the crab species, may be compatible with: 1. Gouramis 2. Tetras 3. Hatches 4. Sw…
Health
- Signs of a healthy freshwater crab
1. Active scavenging 2. Healthy appearance 3. Bright, even coloring 4. No missing appendages
FAQs
- What do freshwater crabs eat?Freshwater crabs benefit from a varied diet consisting of flakes, freeze-dried, sinking pellets and wafers or frozen food. How do you set up a freshwater crab tank? Make sure you have an aquarium that is large enough for the species of freshwater crab you are housing and that it has a secure lid, as freshwater crabs can climb and possibly escape. So…