Can You Have a Pet Crab? Everything You Need to Know!

Having an unusual pet like a crab can be an exciting and rewarding experience. Crabs have unique personalities and behaviors that make them fun and fascinating companions. However, caring for a crab does require some special considerations. In this article we’ll cover everything you need to know about having a pet crab.

What Kinds of Crabs Can Be Pets?

Not all crabs can be kept as pets Here are some of the most common types that do well in home aquariums

• Hermit crabs – These terrestrial crabs are very popular pets. They come in many color varieties and need both land and aquatic areas in their habitat.

• Fiddler crabs – Named for the male’s oversized claw, these semi-aquatic crabs add lots of activity to tanks. They prefer to live in groups.

• Red claw crabs – Vibrant red claws make these crabs stand out. They are active scavengers but can be escape artists!

• Halloween moon crabs – Colorful crabs with an aggressive streak. They are best kept alone or in same-sex pairs.

• Thai micro crabs – Tiny freshwater crabs under 1/2 inch long. They should only live with peaceful tankmates.

• Vampire crabs – These orange and purple crabs have glowing yellow eyes. They are a newly discovered species that is still uncommon in the pet trade.

Can You Keep Crabs You Catch?

Collecting crabs from the wild is not recommended. You won’t know what species they are or if they carry diseases. It’s best to purchase pet crabs from a reputable dealer.

Crabs bought live from a seafood market also won’t do well as pets. They are stressed from shipping and handled roughly. Pet store crabs bred in captivity are healthier starter crabs.

What Do Pet Crabs Eat?

Pet crabs are omnivores that enjoy a varied diet. Here are some common foods:

• Commercial pellet foods made for crabs

• Brine shrimp, bloodworms, daphnia

• Chopped seafood like shrimp, clam, fish

• Blanch vegetables like cucumbers, carrots, lettuce

• Occasional treats like worms, flies, mealworms

Feed only as much as they will eat in 5-10 minutes, 1-2 times daily. Remove uneaten food to keep water clean.

Crab Tank Setup

Crabs need an adequately sized tank, at least 5 gallons for 1-2 small crabs. Divide the tank into dry land and aquatic areas if your species requires both.

Land crabs need substrates like play sand, coconut fiber and moss to dig and climb on. Aquatic crabs need hiding spots like caves, driftwood and plants.

Equip the tank with a tight fitting lid, screened vents and filters suited to tank size. Maintain water in the ideal temperature and pH range. Perform partial water changes weekly.

Are Crabs Social Pets?

Some crabs are very social and should be kept in groups, like fiddler and Thai micro crabs. Others like Thai devil and Halloween moon crabs are aggressive toward each other. Read up on your particular crab’s temperament.

Never keep multiple male fiddler or red claw crabs together. They will fight over territory. Instead keep one male with multiple females.

Hermit crabs are social but only briefly. After short supervised play sessions, return them to separate enclosures.

Do Pet Crabs Need a Vet?

It’s a good idea to have an exotic veterinarian you can call if health issues arise. Look for a vet familiar with crabs and aquatic life.

Signs of illness in crabs can include reduced activity, loss of appetite, changes in color or behavior. Have an isolation tank ready in case a crab needs to be separated.

With proper care, most pet crab species can live 2-5 years or longer in captivity. Provide the right environment and a balanced diet to keep your crabs healthy.

Are Crabs Difficult Pets to Care For?

Crabs do have some specialized care needs. But they are not extremely challenging pets if you research how to properly set up and maintain their habitat.

Here are some tips for avoiding common pitfalls of pet crab keeping:

• Invest in appropriate tank size and accessories right away. Don’t try to make do with things you have on hand.

• Read specific care guides for your crab species. Each one is unique so never generalize their needs.

• Check water parameters like ammonia levels frequently. Invertebrates are sensitive to poor water quality.

• Resist impulse purchases of under-researched species just for novelty. Stick to well known starter crabs.

• Don’t underestimate their climbing skills! Weight down lids, seal gaps and use floating decor they can’t scale to escape.

• Isolate new crabs or do introductions gradually. Even “social” crabs can turn aggressive toward strangers.

Are Pet Crabs a Good Choice for Kids?

Crabs can make great starter pets for children over age 8, with supervision. Things kids enjoy include:

• Picking out their own crab at the pet store

• Choosing fun tank decorations and substrates

• Watching the crabs scurry around and burrow on land

• Learning about the crab’s biology like their molting process

• Helping feed the crabs and change their water

Stress that crabs are living creatures that depend on them, not just toys to play with. Guide them in handling crabs gently. Make caring for the crabs an educational experience.

When properly researched and cared for, pet crabs can bring years of enjoyment. Their small size belies big personalities! Different crab species have diverse needs, so read up before bringing any new crab home. Provide them a safe, stress-free life and they will thrive under your care.